[Q] Any software that would mess up modem to prevent signal? - Captivate Q&A, Help & Troubleshooting

Before I buy another used Captivate to swap motherboards, I'd like to know if there's anything else I should look at.
Scenario: Bought used Captivate with bad USB port and running CM9 Beta. Once I finally got my SIM card, I had no network signal (couldn't even find any operators when you search for them). Redid the APNs multiple times though those seem to be for Internet and MMS rather than cell. Wifi works fine. Flashed to CM 9.1 stable. No difference. Verified phone is unlocked. Verified IMEIs match. Verified baseband was listed. Verified my phone # is listed. Flashed to CM 7.1. No difference. I wanted to flash to stock but can't because Mobile Odin won't work with CM's partition layout. Thus, it seems I am stuck with CM or MIUI.
Is there anything in efs or another system directory that could prevent me from getting a signal?

topshot said:
Before I buy another used Captivate to swap motherboards, I'd like to know if there's anything else I should look at.
Scenario: Bought used Captivate with bad USB port and running CM9 Beta. Once I finally got my SIM card, I had no network signal (couldn't even find any operators when you search for them). Redid the APNs multiple times though those seem to be for Internet and MMS rather than cell. Wifi works fine. Flashed to CM 9.1 stable. No difference. Verified phone is unlocked. Verified IMEIs match. Verified baseband was listed. Verified my phone # is listed. Flashed to CM 7.1. No difference. I wanted to flash to stock but can't because Mobile Odin won't work with CM's partition layout. Thus, it seems I am stuck with CM or MIUI.
Is there anything in efs or another system directory that could prevent me from getting a signal?
Click to expand...
Click to collapse
I've been with you on another thread so I know for a fact you've tried all that stuff. But I don't recall did you ever try to flash an new or different modem? If you haven't or just want to try a new one I attached the one I use. Or I can get you the link to a page with a whole lot of others to choose from.
Other than trying a new modem I'm at a loss as to what it could be besides hardware at this point. Btw were you ever able to test your sim card in another phone to make sure it's functioning? Or do you know anyone with an att sim that you could test your phone with?

Things you could try:
1. Turn the flight mode on and then turn it off and see if that helps.
2. Open the phone and see if the antenna's contact points are okay.
3. Open the nv_data.bin in efs directory and see if the value at the offset(you can search for the exact value) that stores the network lock flag is 00. If it is 01 then it is still locked. I know you checked for the lock already but it never hurts to double check. You could also take a look at nv.log and see if there is anything there at the end that might be helpful. You could also check for lock by dialing *#7465625#.

m1batt1 said:
Other than trying a new modem I'm at a loss as to what it could be besides hardware at this point. Btw were you ever able to test your sim card in another phone to make sure it's functioning? Or do you know anyone with an att sim that you could test your phone with?
Click to expand...
Click to collapse
My next move was to flash some other modems actually, but I may wait until after tomorrow (see below). I tried to swap with my SIL who is on the same service but her phone takes the micro SIM. I'll try again Wed night with another choir member that has an ATT S2 I think.
uhm said:
Things you could try:
1. Turn the flight mode on and then turn it off and see if that helps.
2. Open the phone and see if the antenna's contact points are okay.
3. Open the nv_data.bin in efs directory and see if the value at the offset(you can search for the exact value) that stores the network lock flag is 00. If it is 01 then it is still locked. I know you checked for the lock already but it never hurts to double check. You could also take a look at nv.log and see if there is anything there at the end that might be helpful. You could also check for lock by dialing *#7465625#.
Click to expand...
Click to collapse
1. No help.
2. Where are the contact points? I've not found any schematic or disassembly instructions for this phone. I can see the external antennae connector, of course.
3. That was how I verified it was unlocked. All the bits in the appropriate area were 00. I'll have to look at the log file.
How would I dial any service code with no service? It tells me "mobile network not available" once I hit the Phone button.
New Info
I'm really hoping this is the answer to all my headaches the past several days trying to figure out why this phone won't get service. I just spent the past hour on the phone with my OLD carrier trying to re-activate my OLD phone with a different number to give to my son. We had to jump through a bunch of hoops because my old line was still "suspended" because of the port order. It is due to be "deleted" tomorrow. So even though my NEW carrier said activation was complete and my OLD phone stopped making and receiving calls 8 days ago, could the fact my number has been "suspended" be the reason I can't see any GSM networks?

Sadly my SIM worked in another phone but his didn't in mine.
Looks like I have a mini netbook.

topshot said:
Sadly my SIM worked in another phone but his didn't in mine.
Looks like I have a mini netbook.
Click to expand...
Click to collapse
Any luck changing modems?
Sent from my SGH-I897 using XDA

m1batt1 said:
Any luck changing modems?
Click to expand...
Click to collapse
I flashed back to CM 9.1 and then flashed in XXJVU - 12/28/2011

are you getting a good signal strength? that would veify antenna is okay.
Sent from my SAMSUNG-SGH-I897 using xda app-developers app

laughingT said:
are you getting a good signal strength? that would veify antenna is okay.
Click to expand...
Click to collapse
I'm not getting ANY signal. It always shows -110 dbM or less and 0 or 1 asu. The seller said the GPS worked fine, but I don't get a lock on that either (but maybe you need to "fix" the GPS with each ROM flash?). I've only been concerned with cell service at this point.
I'm going to pick up another Captivate in another hour. I'd like to root and unlock it right there to make sure it works, but don't think I'm that good yet to do quickly and safely. Assuming it's running KK4, the Easy Root pgm seems simple enough to root. May also try SuperOneClick.
For unlocking, I'd hoped to use Galaxy_S Unlock, but couldn't figure out how to get it onto my micro SD card to load onto the other phone.

The "new" Captivate works. It came with KK4 and a good USB port. I'll flash something onto it soon once I learn how to properly back up everything.

glad your new one works.
re: old phone gps. i think you may need to edit gps.conf in etc folder to set gps mode to standalone, rls the gps wants a network connection. in standalone mode, expect a v long time to lock, like 15 minutes.
Sent from my SAMSUNG-SGH-I897 using xda app-developers app

topshot...
While u r on kk4 see this post for gps fix... http://forum.xda-developers.com/showthread.php?p=19422197.
Sent from my SAMSUNG-SGH-I897 using xda premium

If you start the phone without a sim card in it, does it detect its absence and vice versa too? If that functions properly then another possibility could be that the IMEI of the phone might be blacklisted. It might have been reported as stolen. You could call your carrier to find that out.

uhm said:
If you start the phone without a sim card in it, does it detect its absence and vice versa too? If that functions properly then another possibility could be that the IMEI of the phone might be blacklisted. It might have been reported as stolen. You could call your carrier(AT&T I suppose) to find that out.
Click to expand...
Click to collapse
Yes, it detected whether a SIM was in it or not. When I had signed up for the new service it had said the IMEI was OK. I guess that doesn't mean it stayed that way. I would think that would just prevent you from accessing the service, not prevent you from detecting a signal at all. When I picked up the second used Captivate, his SIM card had been deactivated, but it still showed it was getting a signal.

topshot said:
Yes, it detected whether a SIM was in it or not. When I had signed up for the new service it had said the IMEI was OK. I guess that doesn't mean it stayed that way. I would think that would just prevent you from accessing the service, not prevent you from detecting a signal at all. When I picked up the second used Captivate, his SIM card had been deactivated, but it still showed it was getting a signal.
Click to expand...
Click to collapse
Once I had my efs folder deleted while flashing a rom and my IMEI defaulted to some value and it showed no signal at all. I checked IMEI and realized it was a different one and that led me to look at the efs. Once I restored the efs folder from my back up, all was fine again. Therefore I think if your IMEI is blacklisted it could happen and hence made that suggestion to call your carrier. Your carrier might also be able to tell you if your phone made any attempts to register on their network or not.

Related

Captivate not registering on network/holding signal

Yes, I have read every other thread I could find.
Anyways, I bought a Samsung Captivate on Kijijii. I did test it before I bought it, and it picked up 5 bars, and more importantly, held the 5 bars.
Took it home, and ordered the unlock code, which took a few days to get through. In the meantime I upgraded the phone from 2.2 to 2.3.3. Everything seemed to be fine. Got the unlock code, put in my SIM card, put in the unlock code....everything worked perfectly. It didn't pick up a signal though at first, which is a problem with my carrier(I think). They make you go in and manually search and then register. Which I did. Well, for the longest time it wouldn't find the carrier. I have pretty crappy service, so I went outside, still nothing.....went to work and stood under a cell repeater which gives 5 strong bars to any other phone, and my Captivate would show my carrier, I would register, and it would get 1 bar, and then within 10 seconds, it would lose signal again. All while I was standing right beside the cell repeater.
Not only that, but for some reason it would turn on flight mode, and then when I would try to disable it, it would sit there for about 20 min doing nothing.
I went back to 2.2.....still did the same thing. Went to 2.3.3 again, still the same problem. Tried 3 different modems for my specific model phone, 1 of them would find the network instantly, register within 10 seconds, and then drop signal again and go into enabling flight mode, and being a general pain in the ass to turn off. I would actually have to reboot the phone to be able to search for networks again.
The phone came from Rogers, so I put in my brothers Rogers SIM card, and it instantly found the network, registered and gave me 2 bars without me having to do anything. Except then it began dropping signal, getting signal back...dropping it, getting it back. It is winter here right now, and we do have spotty service, but I have Samsung Fascinate that holds at least 1 bar consistently. Not sure if the antenna strength is better. From what I understand they are more or less the same.
I swapped out my SIM card into a different unlocked phone and got service instantly, and then put another different SIM card into the Captivate, and it had the same problem.
I'm pretty much out of options. I'll try tomorrow to see if I can hold a Rogers signal better, which it hopefully can because I'm thinking of selling it.
But I'm inclined to believe that it might be a software problem. Problem is I have no idea what to do in order to fix it.
Any help would be greatly appreciated. Thanks!
Played around with it a bit more. On 2.3.3 with the KH3 modem installed, it will find the network, then try to connect for 10 min, where it will then say 'unable to connect, please try later.'
Then after clicking again, it will say 'unable to connect, select automatic registration' and then sit there for another 5 min. When it finally comes back, I will click on 'select automatically' and it will say after a couple min, 'registered on network', but won't get signal.
All of this I do with 5 bars service. Or in an area with 5 bars service.
Also, the flight mode constantly comes on, and disables 'mobile networks'....so I can't access it. And its a bit weird that it would do that, since any other android phone that I've had, when I lost service, it would constantly try to connect, not go into flight mode and refuse to come out.
Would it help to install a custom ROM on it? I'm going to try going back to 2.2 and test some more stuff. Problem is the small amount of time I spent with 2.2 last night, the phone would crash everytime I tried searching for networks.
After playing around with it even more, I'm convinced that it says 'error while searching for networks' because the phone constantly jumps back into flight mode.
Even when it does get a signal and registers, the phone jumps back into flight mode within a couple seconds, and bang the signal is gone.
Are you flashing with the sim card in the phone? Or if you are flashing through cwm are you leaving the usb cable plugged in?
Sent from my SGH-I897 using XDA App
holeindalip said:
Are you flashing with the sim card in the phone? Or if you are flashing through cwm are you leaving the usb cable plugged in?
Sent from my SGH-I897 using XDA App
Click to expand...
Click to collapse
I flashed with Odin, WITH the SIM card in the phone. I never bothered to take it out. Would it make a difference?
I actually just flashed back to 2.2 with the SIM card in the phone. It found the network, registered on the network, but then dropped signal and activated flight mode again.
Odin flash goes like this. Put phone into download mode, plug phone into USB, open Odin, put 2.2 file into 'phone' section, make sure re-partition isn't checked, click start, and it does everything it should do. Phone restarts running 2.2.
No open ODIN FIRST!!! And then plug in phone... know your stuff before you give false info.
Sent from my SAMSUNG-SGH-I897 using xda premium
After flashing back to 2.3.3 without the SIM card in the phone, I still get the same problem. But the phone doesn't seem to constantly be going back into flight mode.
Does the modem file change if you go back to 2.2 and back up to 2.3.3? I might have flashed the wrong modem or something.
b-eock said:
No open ODIN FIRST!!! And then plug in phone... know your stuff before you give false info.
Sent from my SAMSUNG-SGH-I897 using xda premium
Click to expand...
Click to collapse
I'm not quite sure what you mean. I've done it both ways, and each time the flash has been successful.
I should mention that baseband version on my status menu says 'I896UXKH2.'
And I'm running 2.3.3.
So I'm not sure if the modem changes when you go back to 2.2. I forgot to check that.
I thought you were suppose to put it in the pda slot not the phone??
Sent from my SAMSUNG-SGH-I897 using XDA App
holeindalip said:
I thought you were suppose to put it in the pda slot not the phone??
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
I did actually put it into the PDA slot. Sorry.
Anyways, rooted and installed CM7, installed the KC1 radio, which SHOULD work in Canada on the 850mhz band, and when I search for networks, the only network it finds is Can Rogers Wireless Inc. Up till now it found MTS as well, which is the network I want to use.
I have an MTS(working SIM card) inside the phone. Just bizarre. Could the unlock code not have worked correctly?
Just completely bizarre. I couldn't get any modem to even recognize and find my network of choice, MTS.
So I went back to exactly how the found was when I bought it. Stock 2.2. Going to find out if even a Rogers SIM card will work in it.
There could be two possible things:
1. Unlock code would had messed up.
2. Corrupt IMEI number! Check IMEI number on the box of your phone or below battery and compare with that of the phone (*#06# or settings)...
bindaasathar said:
There could be two possible things:
1. Unlock code would had messed up.
2. Corrupt IMEI number! Check IMEI number on the box of your phone or below battery and compare with that of the phone (*#06# or settings)...
Click to expand...
Click to collapse
+1 you beat me to it!
Sent from my SAMSUNG-SGH-I897 using XDA App
bindaasathar said:
There could be two possible things:
1. Unlock code would had messed up.
2. Corrupt IMEI number! Check IMEI number on the box of your phone or below battery and compare with that of the phone (*#06# or settings)...
Click to expand...
Click to collapse
The IMEI number on the status menu on the phone is identical to the phone under the battery.
So that leaves the unlock code. The guy who gave it to me, cellunlocker.net gave me instructions for locking it to a specific carrier. I tried that with MTS, and it doesn't work. Basically you punch in a code in the dialer, put in the MCC/MNC code, put in the network lock code, and lock it for that carrier. It said it worked successfully, so I have no idea what else went wrong.
The instructions I mentioned above he gave me after I told him the original method didn't work. That method being putting in non-accepted SIM card, and the box pops up asking for network unlock code. I punched the code in he gave me, and it said unlock successful.
Anything else I should do?
I have the similar problem on any 2.1~2.3 stock firmware which I have tried.
I'm using Tmobile now, and the IMEI is correct.
But I only receive 1 bar or no bar signals.
tennyleaz said:
I have the similar problem on any 2.1~2.3 stock firmware which I have tried.
I'm using Tmobile now, and the IMEI is correct.
But I only receive 1 bar or no bar signals.
Click to expand...
Click to collapse
So you unlocked your phone as well? Perhaps the bands are wrong? I know T-mobile uses a different band than other US providers.
In my case, the Captivate uses the 850/1900 bands, which is what Rogers and MTS use.
MTS being the carrier I want to use it on.
Azure1203 said:
The IMEI number on the status menu on the phone is identical to the phone under the battery.
So that leaves the unlock code. The guy who gave it to me, cellunlocker.net gave me instructions for locking it to a specific carrier. I tried that with MTS, and it doesn't work. Basically you punch in a code in the dialer, put in the MCC/MNC code, put in the network lock code, and lock it for that carrier. It said it worked successfully, so I have no idea what else went wrong.
The instructions I mentioned above he gave me after I told him the original method didn't work. That method being putting in non-accepted SIM card, and the box pops up asking for network unlock code. I punched the code in he gave me, and it said unlock successful.
Anything else I should do?
Click to expand...
Click to collapse
I ordered my unlock code from cellunlock.net and it didn't take. I used the Galaxy S Unlock app and it worked fine. When you enter *#7465625# it does show the network lock as off right?
codwif said:
I ordered my unlock code from cellunlock.net and it didn't take. I used the Galaxy S Unlock app and it worked fine. When you enter *#7465625# it does show the network lock as off right?
Click to expand...
Click to collapse
Didn't take as in it said it cannot unlock? Because when I put in the code from cellunlock it said unlock successful.
But I didn't know you could check with that code. I'll do that later. Thanks.
So apparently I had locked the phone to MTS. Put in a Fido SIM card to try something different, and it said enter network unlock code. Entered the unlock code I got, and it said unlock successful.
Now when I type in *#7465625# it says 'off' under all the headings, just like my Fascinate says.
It still holds signal, loses signal though with Fido. I have no idea if that is a problem or what is going on. It'll get 2 bars, or about -99dbm, 5asu, and then suddenly drop it. Get it back again....drop it after 10 seconds.
Apparently flight mode is going on, going off, going on, going off....which is apparently why it loses signal, and gets it back again.

Suddenly lost SIM visibility...?

I'm running the latest Cyanogen 9 Nightly. While texting I set my phone down and it suddenly lost signal.
So far I've tried re-flashing, wiping data, restoring older backup, other SIM cards and always with the same result. "NO SIM CARD"
I've never used any micro-SIM adapter or anything like that, so I doubt the pins are damaged...
Could there have suddenly been an EFS-related issue?
First time I've encountered this, so...any thoughts...?
I had this issue a few times when changing SIM cards,
I eventually solved it by having to "Wedge" one of my SIM cards in for it to be picked up, the other however works without issue so I suspect I have a faulty card due to the time it's spent in my wallet..
I'll try to re-flash to stock GB.
I have absolutely nothing showing up in my APN menu.
I'll try configuring it manually from someone else using the same provider...
Bad timing....really bad...
eug3n91 said:
I'll try to re-flash to stock GB.
I have absolutely nothing showing up in my APN menu.
I'll try configuring it manually from someone else using the same provider...
Bad timing....really bad...
Click to expand...
Click to collapse
You should be able to check your EFS folder, But I think it's unlikely if it just "Happened" a while after the flash..
CJSlim79 said:
You should be able to check your EFS folder, But I think it's unlikely if it just "Happened" a while after the flash..
Click to expand...
Click to collapse
It happened right after sending a couple of texts...it just DIED...
With stock GB still doesn't recognise any SIM card...
Try inserting sim other way around.
Or check if lockscreen is working at all. You might have to, in ics do some special stuff.
Go to settings, security and check if you can lock the sim and change pin. Just try that to check if lockscreen functionality is down. If it is, check my threads, in statistics section in profile, I might have experienced something similar.
http://forum.xda-developers.com/showthread.php?t=1649348
Sent from my GT-N7000 using Tapatalk 2
baz77 said:
Try inserting sim other way around.
Or check if lockscreen is working at all. You might have to, in ics do some special stuff.
Go to settings, security and check if you can lock the sim and change pin. Just try that to check if lockscreen functionality is down. If it is, check my threads, in statistics section in profile, I might have experienced something similar.
Sent from my GT-N7000 using Tapatalk 2
Click to expand...
Click to collapse
SIM security doesn't work. It's as if the SIM card isn't even there...
Well, its easy to dammage connectors, check if they are bent.
If not and simcard inserted right way try the fix in the thread I posted anyway. You do need to be rooted for that.
Also check if efs is still there and emei is correct. Dial *#06#* for that.
If after reboot it still doesnt work, and you have tried other roms. I'd suggest going back to stock condition unrooted and call upon warrentee. Seems to be special hardware issue.
Sent from my GT-N7000 using Tapatalk 2
baz77 said:
Well, its easy to dammage connectors, check if they are bent.
If not and simcard inserted right way try the fix in the thread I posted anyway. You do need to be rooted for that.
Also check if efs is still there and emei is correct. Dial *#06#* for that.
If after reboot it still doesnt work, and you have tried other roms. I'd suggest going back to stock condition unrooted and call upon warrentee. Seems to be special hardware issue.
Sent from my GT-N7000 using Tapatalk 2
Click to expand...
Click to collapse
I'll do just that now, yeah...thanks.
youre welcome,
I think I got all points there. If another user knows anything additionally that I missed please share
Sent from my GT-N7000 using Tapatalk 2
I think its efs related problem
Do you still have the imei number
I wanted to add a me too here, under the same circumstances. I have not yet flashed to a stock ROM yet, but will try. I doubt I have the warranty option. Hope to find a positive solution.
Using CM9 based paranoid Android.
I had the same problem when I got my note thought it was a faulty phone but took it to my local Vodafone store and it was the sim card itself the chip had worn away and was not making a connection...the sim card was only two years old so if its an old sim that good be ur problem and not the phone itself...
Sent from my Xoom using XDA Premium HD app
I forgot to add that I can rule out my SIM card as I have several phones to test on. In my mind, this leaves software and hardware.
Out of curiosity, are the radios (basebands?) flashed for each new ROM, or is it just for a major upgrade?
I think I've discovered my issue at least. I am nearly certain that it is related to heat. Web browsing while charging, playing resource heavy games, using gps in a hot car will cause the radio to fail. If I restart, radio is still gone as long as the phone is still hot. Allow it to cool naturally, or put it in the refrigerator for a short while, and radio is back.
I think my goal now must be to find the coolest kernel / ROM combo while I am using this as a phone. Perhaps motivation for the Note 2?
undrwater said:
I forgot to add that I can rule out my SIM card as I have several phones to test on. In my mind, this leaves software and hardware.
Out of curiosity, are the radios (basebands?) flashed for each new ROM, or is it just for a major upgrade?
Click to expand...
Click to collapse
I was hasty...the issue WAS my SIM card. My Skyrocket was probably much less sensitive to the corruption than the Note.

[Q] Can't set APN, and other SIM problems

Hello,
I have problem with SIM card on my phone. I'm using Temasek's CM 10.1, Kowalski kernel, and V20I-EUR-XX baseband. When phone boots, I normally input my PIN, but it doesn't connect to network, I have to go to Mobile networks and Choose operator automatically, then it connects. I can call and send messages normally, but when the call hangs (me or the other side) it says SIM card error (something like that). Also I can't save APN. In APN settings there is nothing, and when I create APN manually, I input everything and press save, but it doesn't stay, APN's remain empty. I use micro-SIM with adapter, because my operator couldn't get me normal SIM at a time. I'm on Croatian provider VIP. Everything normally worked with micro-SIM from Tele-2 provider (although on CM 10, and CM 7, didn't test it on CM 10.1).
Is it related to my SIM card or SW (ROM or baseband)?
mind_challenge said:
Hello,
I have problem with SIM card on my phone. I'm using Temasek's CM 10.1, Kowalski kernel, and V20I-EUR-XX baseband. When phone boots, I normally input my PIN, but it doesn't connect to network, I have to go to Mobile networks and Choose operator automatically, then it connects. I can call and send messages normally, but when the call hangs (me or the other side) it says SIM card error (something like that). Also I can't save APN. In APN settings there is nothing, and when I create APN manually, I input everything and press save, but it doesn't stay, APN's remain empty. I use micro-SIM with adapter, because my operator couldn't get me normal SIM at a time. I'm on Croatian provider VIP. Everything normally worked with micro-SIM from Tele-2 provider (although on CM 10, and CM 7, didn't test it on CM 10.1).
Is it related to my SIM card or SW (ROM or baseband)?
Click to expand...
Click to collapse
Not sure if you read my post, but I think we are having the same issue regarding the APN, etc.
Not been able to solve mine yet, perhaps together we can put out enough info that someone here can offer a solution? I haven't changed the baseband or kernel on their own, only went from stock 2.3.3, to CM10.1, then to CM7.2.
Are you able to remove the SIM PIN? If you remove the SIM PIN from security, are you able to save APN?
Does your phone access data with the native SIM card the phone was originally locked to?
gglobal19 said:
Not sure if you read my post, but I think we are having the same issue regarding the APN, etc.
Not been able to solve mine yet, perhaps together we can put out enough info that someone here can offer a solution? I haven't changed the baseband or kernel on their own, only went from stock 2.3.3, to CM10.1, then to CM7.2.
Are you able to remove the SIM PIN? If you remove the SIM PIN from security, are you able to save APN?
Does your phone access data with the native SIM card the phone was originally locked to?
Click to expand...
Click to collapse
It seems that PIN is already disabled in Settings-Security-SIM card lock settings :silly:
I called my old operator and they told me my phone was sold locked, and new operator told me they can't help because I didn't buy the phone from them. But then how it works now for calls and messages?
I don't have any other SIM with me so I can't test it with my phone. You say going back to CM7 didn't help? I guess I shouldn't try that then.
Maybe flashing stock ICS would? Any other suggestions?
mind_challenge said:
It seems that PIN is already disabled in Settings-Security-SIM card lock settings :silly:
I called my old operator and they told me my phone was sold locked, and new operator told me they can't help because I didn't buy the phone from them. But then how it works now for calls and messages?
I don't have any other SIM with me so I can't test it with my phone. You say going back to CM7 didn't help? I guess I shouldn't try that then.
Maybe flashing stock ICS would? Any other suggestions?
Click to expand...
Click to collapse
I haven't tried stock ICS yet; maybe it would? I will try that tonight.
Mine shows the SIM PIN on, when I try to change it it asks for my old code, which I don't have of course, so I can't remove the security. Been hoping that someone else would have had experience or knowledge of what would cause the problem and have a solution or suggestion to try. The closest I came was on a different forum about a Sony Ericsson phone, but the rooting and flashing procedures are so much different I couldn't see a solution in it, though they suggested flashing the baseband iirc.
HMMMM, now that I read your reply, I can't say with 100% certainty that the phone was unlocked before I rooted and flashed CM10.1.....I had thought it was but perhaps it wasn't, and we are having a more similar issue than I thought. So the glitch, perhaps, is that it was not unlocked, the custom ROM somehow "half" unlocked it, and here we are stuck.
Okay, my only thought then is to take it back to stock everything, the most up to date I can find, then unlock it with code, and see if I can change the APN at that point. If so, I will root it, use My Back Up Root to save settings including APN (just in case so at least I can restore it that way if I can't do it manually, after)flash CM10.1 again or another fabulous custom ROM which is what I really wanted in the first place
I will try that tonight, and post you the results. Let me know if you have any (better) suggestions as well, I'm up to try almost anything at this point. Was hoping to upgrade to this for my daily phone as I'm limping along with a Acer Liquid MT that has seen better days
If anyone has a link to quickly point me towards the latest stock ROM etc. and wants to post here, I would be much obliged Might save this noob a few hours scratching his head to find what is most certainly in front of my nose already, but I digress...
Cheers
New baseband
I just flashed V30A baseband, and it didn't help. We can cross that from the list.
Well colour me confused...and happy?
I just today picked this project up again, about to attempt a different fix, again...*sigh.
Lo and behold, i insert my sim and power on the phone, and it asks me for network sim unlock.....odd because I'd used the phone with this sim before, through all my other testing, flashed different roms, etc. etc. In fact, I've used the phone on this very package, I know because there are sms messages on the phone from using it. Battery pull, remove sim and check, yup sure enough, old messages there. Hmmm...
Insert sim, reboot, asks for unlock code again. Well, what have I got to lose at this point right? As I said before, I THOUGHT I had unlocked the phone before starting this whole debacle, but wasn't 100% certain about it. Searched my email for the code since I always save them, couldn't find it. Well, in for a penny, in for a pound I suppose. Bought a new unlock code, waited for it to arrive. Input new unlock code, unlock successful!!
Reboot phone....waiting for service....(this seems like forever!!! In reality, less that 60 seconds.) Alas, I have service. And now, just to tempt fate, Apps->settings->wireless & networks->more->mobile networks->access point names..........:fingers-crossed:
I can hardly believe my eyes, there it be, Rogers Internet apn selected. It even auto-detected the damn thing!!
I can offer no further insight, I don't believe I physically did anything to arrive at this remedy. But there you go, for my part at least it's solved.

How do you fix Not Registered On Network?

So as of saturday my unlocked TMobile Note 4 stopped working as a phone, and won't let me make calls.
Information:
-Was on Dr. Ketan L3 version of his rom when it stopped working
-Using the N910T on AT&T
-IMEI is fine and not damaged, both numbers match (using *#06#)
-It shows bars, but when I go to make a call "Not Registered On Network"
What I've Done:
-Flashed Stock Firmware via Odin (Autoboot, and F.Time Rest checked)
-Factory Reset after odin flash
-Checked APN
-Set on LTE/WCDMA/GSM
-Searched for Networks, finds them, but when I choose AT&T it takes forever and then finally kicks me out and then in notifications, I get the "Not Registered to Network"
-Did the remove the battery thing, and removed sim
-Went to AT&T and got a new sim, worked for 1hr (sporadically) and then went back to "Not Registered on Network"
-At the store I was on phone with AT&T tech trying to troubleshoot the problem and that is when it was working shortly
-Called T-Mobile and checked to see if they blocked my IMEI number, nope they didn't, couldn't help me out further than that
-AT&T was showing that it was a Note 4 so not having that coming up as a Blackberry issue that some reported, so that's not it
-*#0011# shows service limited, but it is unlocked and everything is fine, the IMEI is good, and all is well but the limited service
-Put it in Airplane mode and woke it back from there after 5+minutes
-cleaned the connectors on the sim (new sim anyways so shouldn't really need them)
I'm running out of options, the only thing I can think of being the problem is that I might have started out using this phone on COD2, and when I flashed a COG2 firmware it didn't like that and so my phone's account settings didn't fully transfer.
Also I was messing around with the bands settings (*#2263#) what should they be on? Automatic, LTE/GSM only, or what?
Settings should be on automatic. One more thing to try is go for a drive with the phone, at least 5 miles from your house, and see if it does this when connected to other towers. I had this same issue years ago and it turned out to be a malfunctioning tower by my house.
If it still does it on other towers, then it may be hardware-related
kabuk1 said:
Settings should be on automatic. One more thing to try is go for a drive with the phone, at least 5 miles from your house, and see if it does this when connected to other towers. I had this same issue years ago and it turned out to be a malfunctioning tower by my house.
If it still does it on other towers, then it may be hardware-related
Click to expand...
Click to collapse
Thanks, yeah it kicks in randomly for like a minute and then dies, I take it to my parent's house (about 10 miles away) and along the way I get a good signal, but then when I reach their house, back to nothing. I was using it just fine the week prior. I partially blame Dr. Ketan, ever since installing his rom, I had multiple issues. I since uninstalled it and tried going back to stock. Any idea on what a good "safe" band setting is? I have that settings set to automatic, but if there was a good "safe" band that would be great. A common LTE tower. Even when I do connect or get connected, I can't register on that network, my phone won't let me. I've tried that. The bars drop to zero. I damaged my antenna wire (white one) and I just replaced it with a new one I purchased, but the hacked together one seemed to be doing the same quality job as the new one is. It shows the signal, but as soon as you try tying it down to a network it rejects it. I was afraid that when I flashed the stock image via odin it removed the unlock, but it was still there. I just hate that now I have a $500 pda, when it was a phone and now i'm relegated to using a f*ing flip phone.
i think your antenna cable is damaged. the only way to know that is be close to a tower, and see if your work or not.
bought and replaced with new ones, I get full bars, in my bedroom, but apparently they're tied to Tmobile since when I try to register it to AT&T they magically disappear, but when I close the app, they come back at the same strength level. I can't register them to Tmo since the sim. Yet my phone is telling me it's unlocked (*#0011#), IMEI = PASS, 1;
I think the prob is due to the different frequencies.
Your baseband would not be tied to a rom(ie Dr Ketan) Unless that rom contains Modem.bin
Your apn needs to be att if that's your Sim obviously.
International version has a different chipset. .. I know it's not your case. .
But it's open to any Sim. ..
I can say this.. I have a N2 unlocked (tmob) I run an Att Sim it works but the sig is really spotty... COD6/ COG2 may not be lining up frequency wise with your att Sim. ..
Try rolling your baseband back even further. .
Flashvetrin
Any clue on to what i should use for best results? Like 850/1900 or 900/2100? What is a good LTE band? Where could I find a map of LTE bands used by carriers, I know how to get to that secret menu and manually change it to see if I get better results?
dcoke said:
Any clue on to what i should use for best results? Like 850/1900 or 900/2100? What is a good LTE band? Where could I find a map of LTE bands used by carriers, I know how to get to that secret menu and manually change it to see if I get better results?
Click to expand...
Click to collapse
Well I would think automatic is out for sure.. the other prob would be after reboot the chipset will search for the default.. but I could be wrong.
I do not know what the numbers would be for band identification.
You may get lucky when calling Att and ask for someone in a higher tier. To give you some numbers for frequincies .
But you have ruled out hardware correct??
By putting a tmob Sim in????
Cuz I know you posted you did antenna work..
And I do know you said you get bars then it fades..
The fact it fades and doesn't lock into even a G band for example. Just leads me to believe the apn can't lock down based on the frequincie and the built in lte chipset...
It would be nice to just flash an att modem wouldn't it?? But don't even think about it.. lol you'll soft brick..
I wish I had a better solid answer you. You may just start testing those different bands and see if you get closer to a lock.
Flashvetrin
U rock, lol. Thx man
My Tricked Out N910P
But what could have happened that made it crap out like that since it was working just fine beforehand for 2 solid months on custom roms and what not? That's the frustrating part, I've been flashing different modems on my phone, but none have been successful. Apparently there are 3 different N910T, how do you know which ones to play with? I flashed N910T(3) bands, that failed, I did try N910A, obviously failed. Then I lost my IMEI number, got terrified, tried reflashing EFS in TWRP, nothing. Then reflashed COG2 bands, it came back. Is there an app on the Playstore that would definitively tell you if your network chip is damaged? I wouldn't know what to look for.
Have you taken apart the Note 4, what are all those contact points, are those antenna things? One of those were damaged, they're like folded metal spring boards with gold tips (same kind of thing that is used to install a qi receiver, same design). I took my tweezer and fixed it, but could that be the culprit, since on the surface, it seems like the network is fine. Works really well in WCDMA, but not much else. I was able to make calls using GSM only, but my signal was 1 bar and the audio quality was questionable, so I left it alone for 10 minutes on that hoping it would force a reconnect. This is frustrating, since I wasted $500 on this phone and not having it work after two months means now I'm back to a featureless phone.
Thanks for your advice thus far. Flashing different modems hasn't been working out well, I just wished I could remember what baseband version the guy had the phone on when I first got it? I thought it was COD6, it was definitely on Lollipop, but if it's a 910T(2) would I know, how would I know?
How do you flash NON_HLOS and modem.bin at the same time in Odin? I know Modem does bands, but what does Non-Hlos do? I thought i read LTE, so if those aren't in sync and on two different versions could that be the issue? I extracted them from the full TAR firmware files.
dcoke said:
But what could have happened that made it crap out like that since it was working just fine beforehand for 2 solid months on custom roms and what not? That's the frustrating part, I've been flashing different modems on my phone, but none have been successful. Apparently there are 3 different N910T, how do you know which ones to play with? I flashed N910T(3) bands, that failed, I did try N910A, obviously failed. Then I lost my IMEI number, got terrified, tried reflashing EFS in TWRP, nothing. Then reflashed COG2 bands, it came back. Is there an app on the Playstore that would definitively tell you if your network chip is damaged? I wouldn't know what to look for.
Have you taken apart the Note 4, what are all those contact points, are those antenna things? One of those were damaged, they're like folded metal spring boards with gold tips (same kind of thing that is used to install a qi receiver, same design). I took my tweezer and fixed it, but could that be the culprit, since on the surface, it seems like the network is fine. Works really well in WCDMA, but not much else. I was able to make calls using GSM only, but my signal was 1 bar and the audio quality was questionable, so I left it alone for 10 minutes on that hoping it would force a reconnect. This is frustrating, since I wasted $500 on this phone and not having it work after two months means now I'm back to a featureless phone.
Thanks for your advice thus far. Flashing different modems hasn't been working out well, I just wished I could remember what baseband version the guy had the phone on when I first got it? I thought it was COD6, it was definitely on Lollipop, but if it's a 910T(2) would I know, how would I know?
How do you flash NON_HLOS and modem.bin at the same time in Odin? I know Modem does bands, but what does Non-Hlos do? I thought i read LTE, so if those aren't in sync and on two different versions could that be the issue? I extracted them from the full TAR firmware files.
Click to expand...
Click to collapse
Heres
A simple method for COD6
And try odin 3.07
I need to think about this some more and get back to you...
This is a partial firmware.. it consists of the modem and bootloader COD6.
Also to rule out damage if you can get a T Mobile Sim put it in the device and see if it locks down a signal....
Flashvetrin
That was my next move, not having any real income but disability and little coming from that, I thought that was the next logical step too. I'll get a tmobile to go sim and try it see if it can't lock on to that, and see if that doesn't set it on the right path. Have you heard of other people having COG2 issues on AT&T unlocked? Maybe that was the problem, something there broke the connection. I don't know, but whatever it is, I can't thank you enough, you've at least given me more options to try that I couldn't think of on my own. I'll try that file.
dcoke said:
That was my next move, not having any real income but disability and little coming from that, I thought that was the next logical step too. I'll get a tmobile to go sim and try it see if it can't lock on to that, and see if that doesn't set it on the right path. Have you heard of other people having COG2 issues on AT&T unlocked? Maybe that was the problem, something there broke the connection. I don't know, but whatever it is, I can't thank you enough, you've at least given me more options to try that I couldn't think of on my own. I'll try that file.
Click to expand...
Click to collapse
You are the first of this kind that I'm aware of.. in regards to this issue..
Make sure you read the detail in if your device bootloops, to reboot recovery and flash the Rom.. if you want flash the Rom in the op that I've linked you to.
Wipe sys/dal/cach/data..
And flash it can't hurt.. [emoji16]
I really hope a Tmob Sim and or COD6 gives you results...and good ones at that.. [emoji2] [emoji106]
Flashvetrin
Got the sim card, $65 for that crap, and it didn't work. Called T Mobile customer service, explained my situation and how I was calling on another phone on another carrier and they insisted on calling me back on the broken not working phone. I guess I'm just screwed, and lost $500, which like I said, I can't afford to have. It's just so frustrating. I also tried the COD6 partial firmware, and nothing there also. I'll try t-mobile again. The only and last option I have, if possible, is to try to relock my phone and re-unlock it since there isn't any real way to tell if my GSM is damaged. I think my unlocked status got damaged when my phone upgraded to COG2, and since it's in that weird limbo state I can't use my phone. Do you know how to relock it?
Edit: When I look at my IMEI Number through *#06# it shows that the last two digits (independent of the actual IMEI number, since that matches everywhere) to the right of the "/" as 14, yet through "about device" it shows my imei version as 10. I assume that the 14 in the "06" screen is the version it's reading off the phone, could that be causing the issue? How would you even fix that? I don't know. but thanks again, you've been helpful.

No mobile network connection, no IMEI

Hello,
my Xiaomi Mi 9T Pro running on stock MIUI Global 12.5.1.0 (RFKEUXM) can now suddenly not connect to my mobile carrier.
I hope somebody can help me out.
Some facts and stuff I have tried:
The connectivity icon on the top is just grayed out now and shows an X.
But that was not the case in the morning today.
At that time it showed full bars, but not the usual 4G text and the mobile internet did not work. After some attempts written below it is now just gray.
Mobile internet and cell service do not work.
I have rebooted multiple times.
The IMEI for both SIM slots is shown as 0.
No baseband version is shown.
(I am sure that this was also not the case early in the morning.)
I have never installed a custom ROM on this device, bootloader was never unlocked.
The SIM card is correctly inserted and the phone number is shown in the settings for SIM slot 1.
Trying SIM slot 2 (incl. reboot) did not fix the problem.
The SIM status shows that the service is not available, also on the top left when the phone is locked. ("Dienst nicht verfügbar" in German locale.)
Trying the SIM in another phone works, which I think makes it not a carrier problem.
Trying another SIM in my phone also does not work.
I unfortunately had dropped the phone days before, but no damage visible at all (phone case FTW).
Also it worked without problems, which makes me hope this is not hardware related.
WLAN works, so internet connectivity is possible.
Phone is out of warranty.
I did search for other threads with similar issues, but they all seem to be related to having flashed custom ROMs and then losing the IMEI.
Does somebody have any idea how I can fix this?
Thank you!
Edit: I just remembered/saw that I did do the "Xiaomi Service Framework" system app update to version 6.0.6-G yesterday night, maybe that caused the problem? Currently researching on how to roll that back. If somebody knows, please do tell.
@Philipp said:
Hello,
my Xiaomi Mi 9T Pro running on stock MIUI Global 12.5.1.0 (RFKEUXM) can now suddenly not connect to my mobile carrier.
I hope somebody can help me out.
Some facts and stuff I have tried:
The connectivity icon on the top is just grayed out now and shows an X.
But that was not the case in the morning today.
At that time it showed full bars, but not the usual 4G text and the mobile internet did not work. After some attempts written below it is now just gray.
Mobile internet and cell service do not work.
I have rebooted multiple times.
The IMEI for both SIM slots is shown as 0.
No baseband version is shown.
(I am sure that this was also not the case early in the morning.)
I have never installed a custom ROM on this device, bootloader was never unlocked.
The SIM card is correctly inserted and the phone number is shown in the settings for SIM slot 1.
Trying SIM slot 2 (incl. reboot) did not fix the problem.
The SIM status shows that the service is not available, also on the top left when the phone is locked. ("Dienst nicht verfügbar" in German locale.)
Trying the SIM in another phone works, which I think makes it not a carrier problem.
Trying another SIM in my phone also does not work.
I unfortunately had dropped the phone days before, but no damage visible at all (phone case FTW).
Also it worked without problems, which makes me hope this is not hardware related.
WLAN works, so internet connectivity is possible.
Phone is out of warranty.
I did search for other threads with similar issues, but they all seem to be related to having flashed custom ROMs and then losing the IMEI.
Does somebody have any idea how I can fix this?
Thank you!
Click to expand...
Click to collapse
Did you check Settings, SIM cards and Mobile networks, SIM 1 (if SIM is in Slot 1)
Do you have Turn on? If Turned Off, then do Turn On
If not, ie if it does not recognize the SIM card, then it looks like a hardware issue
Assuming, as you say, that SIM card is ok, correctly inserted, and that phone runs only the stock firmware - hence no root, no custom ROM, no custom Recovery (that user could possibly wipe partitions), etc
Maybe, some connection got loose and later disconnected completely
Thanks for you answer.
I am sure the SIM is inserted correctly and working. It's been in there probably for years now.
Don't know if you saw my update above about "Xiaomi Service Framework". Checking that right now. Maybe I should just do a factory reset.
What I have noticed now a couple of times is that the phone crashes and reboots, just now happened when I connect for USB debugging or before when trying to enter the SIM pin after a reboot, ...
@Philipp said:
Thanks for you answer.
I am sure the SIM is inserted correctly and working. It's been in there probably for years now.
Don't know if you saw my update above about "Xiaomi Service Framework". Checking that right now. Maybe I should just do a factory reset.
What I have noticed now a couple of times is that the phone crashes and reboots, just now happened when I connect for USB debugging or before when trying to enter the SIM pin after a reboot, ...
Click to expand...
Click to collapse
But if the phone does not recognize the SIM card, it would not ask for the SIM pin
zgfg said:
But if the phone does not recognize the SIM card, it would not ask for the SIM pin
Click to expand...
Click to collapse
Agreed, therefore I am sure the SIM is recognized. The phone even shows my number and the SIM has the carrier name.
@Philipp said:
Agreed, therefore I am sure the SIM is recognized. The phone even shows my number and the SIM has the carrier name.
Click to expand...
Click to collapse
If the carrier name is recognized, then IMEI cannot be NULL
Very strange
Try to play with Preferred network type setting
Maybe something really got wrong with the updated Framework
zgfg said:
If the carrier name is recognized, then IMEI cannot be NULL
Click to expand...
Click to collapse
Oh, I though the IMEI is device specific and should be there even without a SIM inserted.
@Philipp said:
Oh, I though the IMEI is device specific and should be there even without a SIM inserted.
Click to expand...
Click to collapse
AFAIK too - but without IMEI it could not attach to the network and therefore cannot show carrier name
Hence strange, and/or the contradictory descriptions/observations
zgfg said:
AFAIK too - but without IMEI it could not attach to the network and therefore cannot show carrier name
Hence strange, and/or the contradictory descriptions/observations
Click to expand...
Click to collapse
Ohh, sry there is a misunderstanding.
The carrier name is only shown as the NAME of the SIM card (I guess it is stored on there or the phone has remembered it). But there is NO connection or carrier name shown in the top notification bar.
@Philipp said:
Ohh, sry there is a misunderstanding.
The carrier name is only shown as the NAME of the SIM card (I guess it is stored on there or the phone has remembered it). But there is NO connection or carrier name shown in the top notification bar.
Click to expand...
Click to collapse
Yeah but you still have unknown IMEI - that's something that should have not happened
Anyway, go to Preferred Network Type and try with Prefer 4G, Prefer 3G or Prefer 2G - maybe, with the updated Framework, something went wrong with the bands support or so
If it wouldn't help, then I'm out of the ideas how to solve
So I did do a hard reset now, and it worked for a short time (IMEI is back), then it doesn't again, and ... just now again. It really is not stable.
Thx. I will post updates when I know more.
Unfortunately the phone keeps crashing and rebooting when using it. It just freezes and restarts, and sometimes it takes a long time to restart (seems like a crash loop).
Twice I also saw some graphic artifacts (bright magenta and green) on a small part of the screen.
I don't think this is just a mobile network connection problem anymore.
BTW: I have installed an older version of Xiaomi Service Framework (also the hard reset reverted it to a much older version), but that did not help.
Hey!!
I hope you doing great
Did you manage to solve the issue?
@Fawad Hussain
Unfortunately I could not solve it, so I am not able to use the device anymore.
Btw, as far as I can see there is no current smartphone without a notch/punch hole which is not gigantic (ASUS Rog Phone 6).
Fawad Hussain said:
Hey!!
I hope you doing great
Did you manage to solve the issue?
Click to expand...
Click to collapse
Same thing happened to me, I have managed to get it thanks to this guy in the video which I don't understand what he is saying but I just followed his steps, so if you are looking for a solution this video is.
But my device is not rooted and bootloader is locked, I tried ways but don't know how to root it or unlock bootloader properly

Categories

Resources