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Nexus isn't finding network :mad: Help is needed

My Nexus was on 5.0.41, all working sweet, then it stopped "finding" the network. No update, flashing or anything was done prior to the problem.
I tried a SIM from another provider, but still - the "No Service" is written on screen, and when I try to search for networks, it says "Error searching for networks".
I then tried the following ideas (nothing helped):
- Reflashed the Radio image.
- downgraded the Radio image.
- Upgraded it again.
- Flashed the Stock ROM (unrooted and rooted).
- Flashed CM5053.
All was done with wipes as needed.
Any suggestions will be more than welcomed!
Can the device just get bricked like that? with no reason?
It sometimes identifies the SIM's provider (Orange for example) but always with No Service.

It sounds like your SIM card slot isn't holding the card in tight enough to make full contact... try putting a business card, cut down to size, between the SIM and the phone's frame (note, not the contacts side, but the back side) to force the SIM down onto the reader tighter.
If that does nothing, not sure what to tell you?

it didn't help

I'm Italian and I have the same your problem .. I only work in 2G GSM'...ve tried to see if you do so?
I opened another tread here Forum

You need a new SIM.
I just had this problem on Friday. The SIM some how falls of the network and your provider network will not allow it to reconnect.
I can't remember, but if I am right Orange is owned/owns by T-Mobile. Hence they have the same network.
The puzzling part about this is why it happens. This is the second SIM I have gone through with my N1, I also had one go with my G1, my sister bought that G1 and the SIM went out again. My mom bought her G1 same day as me and hers has died once. My friend has a MT3G and his has died two times now. I find this extremely annoying.
I tried every suggestion on the internet for repairing or troubleshooting a SIM. It is a waste of time. Well, everything short of dropping it in isoproply alcohol to clean the contact.

I tried a 2G and a 3G SIM on mine, and had the same result, so my problem is different.
My device just doesn't register with the network, no matter what provider or SIM generation I choose.
Can I ask for a RMA if I unlocked the bootloader?

I do not know you definitely do not pass it under warranty

Ryan then you say you clean the contacts of the nexus or the sim with isopropyl

Mine is now doing that as well and so far everything that I tried isn't fixing it. I get it to connect briefly with edge and then nothing. I am going to try a new sim tonight after work and see if that helps, otherwise unsure of what to do after that...anybody got any answers or suggestions?

I've been suffering from this... have an RMA coming but I got mine to work. Make sure you also have CDMA preferred on there or whatever the default is. If it says unknown you have to reboot the radio somehow. I pulled my battery, waited 5-10 seconds. Then i went and checked airplane mode on and off. Then i checked the service menu again. I can't remember if i had to pull the battery another time but it came back from "unknown" to cdma preferred. You can also try turning the radio on and off via the service menu. Finally select your radio bands for your region by pressing the menu button under phone information again in the service menu and select radio bands. I'm not sure if automatic is a good or bad idea but it couldn't hurt testing it if you still have some issues even after selecting your region specific bands. After this you should be able to maybe search and register or you may need to turn the radio on and off again via airplane or the service menu. I played around with it alot to get it running again.
Also I'm tmobile usa using the one for t-mobile bands. I'm not sure if CDMA preferred is a world wide setting or if its gsm or something else.. but the bands are specific to your region definitely.

help cant connect to network or save proper network or sms settings

a quick history of what I've done so far
Sumsung I897 captivate from ATT unlock and being used on Telus network was working great for about 4 days, then all kinds of problem started cropping up.
Phone came unlocked, I rooted using update.zip from xda, installed rom manager and started removing ATT bloatware, entered SMS and APN info which worked fine.
Yesterday I noticed that where I once got good reception I was now getting nothing and would have to drive down the street before I would get something descent. I thought maybe I'd put it back to stock with rom manager and see if that would help which it did not. It actually made it worse, decided to go all out and use the Odin3 one click downloader just to make sure I was back to stock firmware. This didn't work either but now I can enter the SMS and change the preferred network type but it doesn't save. Preferred network type is grayed out and even though I can change it it never save same as SMS.
Now I can't hold connecting in my living room where my wifes Milestone gets full bars. I tried taking the phone to where I had the best signal and change the preferred network, SMS, and set the network operator but it doesn't save any info, can't find on operator half the time on manual or auto and gave me an error and logged it to #*9900#
I've been at this for 2 days straight and can't figure out how to get it right back to stock, it seems to keep hanging onto the same preferred network and not saving anything I enter.
What can I do to get back to stock, and it has to be something that wipes everything clean, clean, clean, because even the GSM disconnects stay logged under *#*#4636#*#*
***I desperately even tried pulling the batt and SIM card for the night in hopes that would do something.

So, if I'm understand what happened correctly, you bought an unlocked Captivate, rooted it, deleted some bloatware, entered your Telus APN info and everything worked awesome for about four days. Now everything has gone down the hole. Is that right?
If that is the case, then we need to figure out what changed. Using Odin3 would have definitely put you back to stock/unrooted your phone, I don't think you could go back any further than that. If I were you, I would act like I first got the phone. As in, I would do everything you did to it, as if was day one. At one point, everything worked fine. Try to recreate that. You can always look into exchanging it or perhaps Samsung customer support can give you a little more insight to what's going on. Here's the number if you want to try them out.
Samsung customer service - 1.800.726.7864

Thanks, I've gone through the process a few times today from start to finish trying to figure it out ... maybe some of the problems aren't real problems and just limitations that I didn't know where their. I've since flash with odin3+re-partion to the bone stock i897UCJF6 as in not the one click method. It loaded fine but still have the same issue, I can't set preferred network type or get it to keep the number entered into SMSC. I think if I can get passed that I'll be be one the up side of winning. I keep noticing that the log of GSM disconnects never clears or the usage statistics under *#*#4636#*# , I'm thinking its in the same area that other bad data is being held onto instead of being cleared when flash firmware or factory reset.
Is anyone able to change preferred network type? maybe I was never able to change it but I think I should be able too.
I may be wrong in assuming this but I don't think ATT is going to be interested helping me connect one of their handset that I'm trying to use on foreign network, but I could be wrong and is an open option.

*#*#197328640#*#*
debug screen
phone control
network control
band selection
wcdma band
wcdma all
menu->end
used this to lock my phone to WCDMA only so that problem is solved
*** never mind posted to soon it still didn't stick after rebooting
be carefull using the service menu as I have no idea what most of this stuff does

I got the SMS service number issue fix by taking out my sim, swapping in another known working sim from the same network, setting the service number, pressing update and then swapping back. Before every time I tried to update the service number it spit out an "update error" can anybody tell where the SMS config data is stored? on the phone or sim.
The only problem I'm having now is with reception which maybe fixable if I can set the preferred network to WCDMA only. But the button for that option is a light blue colour vs other phones that I can change this setting on. Does the blue mean anything like a locked function or something that set by the firmware as unchangeable?

[Q] Any software that would mess up modem to prevent signal?

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.

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 Service even with full strong 5 bars signal

Hi,
I used my Note 4 for 10 months and today it said "No Service".
I backup and reset the phone, still issue.
I went thru Settings and manually select network, still issue.
I take the SIM out and put in another phone, it worked fine.
I put a working SIM from the other phone, still "No Service" issue.
I never flash firmware on this Note 4.
I don't think the cell radio is dead because the phone has full 5-6 bars strong signal.
Could it be blacklist for some reason? (I bought it from ebay and the seller unlocked it before).
Any help appreciated, thanks.

gsmhelper said:
Hi,
I used my Note 4 for 10 months and today it said "No Service".
I backup and reset the phone, still issue.
I went thru Settings and manually select network, still issue.
I take the SIM out and put in another phone, it worked fine.
I put a working SIM from the other phone, still "No Service" issue.
I never flash firmware on this Note 4.
I don't think the cell radio is dead because the phone has full 5-6 bars strong signal.
Could it be blacklist for some reason? (I bought it from ebay and the seller unlocked it before).
Any help appreciated, thanks.
Click to expand...
Click to collapse
Dial *#06# and see if it shows your imei.
If it shows lots of zeros or ( NULL ) then it might be corrupted or black listed.
Try this app and run it this will refresh your modem and radios
https://play.google.com/store/apps/details?id=com.mcstealthapps3.networksignalsearch

Trex888 said:
Dial *#06# and see if it shows your imei.
If it shows lots of zeros or ( NULL ) then it might be corrupted or black listed.
Try this app and run it this will refresh your modem and radios
https://play.google.com/store/apps/details?id=com.mcstealthapps3.networksignalsearch
Click to expand...
Click to collapse
Thanks for quick reply. *#06# returns same IMEI and SN as in the battery back. I installed and ran the tool as well. Still no service.

gsmhelper said:
Thanks for quick reply. *#06# returns same IMEI and SN as in the battery back. I installed and ran the tool as well. Still no service.
Click to expand...
Click to collapse
Try this steps 1 by 1
1,Go to settings/mobile networks/network mode and change to 2g/gsm and reboot see if it works.
If 1st method dosent work then try 2nd or 3rd
2,Backup everything and factory reset
3,try flash fresh stock firmware via odin tool and do factory reset after flashing firmware.
If all of this doesn't work for you then might be hardware issue in sim slot ic or radio antenna not sure.
Try different sim cards.

https://swappa.com/esn
Sent from my SM-N910T using XDA-Developers mobile app

Check your APN in Setting/Network. Should either be AT&T Nxtgenphone, AT&T PTA, AT&T Phone.

Thanks everyone for helping out. I ended up calling tmobile after checking the IMEI and they unlock it for me because it was reported as lost/stolen.