Database Develop

[Q] poor signal with fake IMEI and product code?

Phone was unlocked by the Galaxy S Unlock app.
And the signal is very poor, usually only one bar or no signal.
I've tried a few modems, but the result seems on change.
I found my IMEI is 0049990........
Product code: SGt ActiveAATT
Does a fake IMEI related with signal?
How can I fix the signal problem?

It is quite possible members on xda have faced connection problem with the generic imei, You can only restore the original imei if u had ever backed up the efs folder which contains the NV_DATA.BIN. If u don't have the correct NV file then its not possible to restore it, You can contact connection2005 he can repair it.
Or you can try this method people have said they were able to restore it with this but it dint worked for me when i once tried it.
http://forum.xda-developers.com/showthread.php?t=881162&highlight=imei

rkkaranrk said:
It is quite possible members on xda have faced connection problem with the generic imei, You can only restore the original imei if u had ever backed up the efs folder which contains the NV_DATA.BIN. If u don't have the correct NV file then its not possible to restore it, You can contact connection2005 he can repair it.
Or you can try this method people have said they were able to restore it with this but it dint worked for me when i once tried it.
http://forum.xda-developers.com/showthread.php?t=881162&highlight=imei
Click to expand...
Click to collapse
I tried the method, but still unsolved.
Because I lost my nv_data.bin, there is no any way to edit nv_data to get my IMEI back?

You have to contact connecxion2005 he can do it. Search for mobile tech videos on youtube he is the guy who can help u.

rkkaranrk said:
You have to contact connecxion2005 he can do it. Search for mobile tech videos on youtube he is the guy who can help u.
Click to expand...
Click to collapse
Get it.
I just have UnBrickable Mod from mobiletechvideos last week.

Before spending money to fix, is it any help to replace my nv_data.bin with other phone's?
I find a nv_data.bin of UK version i9000, and I'm trying to replace with it now.

I mailed to mobiletechvideo.com and ask.
They said the signal problem is not related to IMEI, and I should try different modems.
So what modems could fix this problem?

What ROM are u on?

fuloplori said:
What ROM are u on?
Click to expand...
Click to collapse
I've tried SensatioN, Illuminance, Espresso, and stock JF6 & KJ3. The signal problems are the same.

Is kj3 (i987 base rom) the one ur currently running? If so try kb1, kf1, kh3 ... the captivate modems, if ur on a i9k rom then use the i9k modems kc1,jk4 ,jl2 ,kg3 (the popular ones)...

tennyleaz said:
Before spending money to fix, is it any help to replace my nv_data.bin with other phone's?
I find a nv_data.bin of UK version i9000, and I'm trying to replace with it now.
Click to expand...
Click to collapse
It won't work
Even if it did, that would (most likely) change the IMEI, which is illegal in the United States and several other countries
Basically, your IMEI has to be rebuilt using either Connexion2005's services or one of the SPT/RIFF box kits.
My phone is the same way; the more I think about it, the more I suspect that ATT just sent me a device with a broken IMEI. My EFS backup from when I first got CM7 says the generic IMEI and has the product code line completely broken anyhow.
I would be very appreciative if someone could post the segment of their working NV_DATA.bin from address 00188000 to 00188030 so that I can correct mine to what it should be; the 188008 fix frequently linked to on this forum did not finish the job.
EDIT: I just noticed that my EFS backups seem to be tied in SOME way to the CSC flashed to the phone... Does anyone have the latest I897 ATT CSC?

Aus_Azn said:
It won't work
Even if it did, that would (most likely) change the IMEI, which is illegal in the United States and several other countries
Basically, your IMEI has to be rebuilt using either Connexion2005's services or one of the SPT/RIFF box kits.
My phone is the same way; the more I think about it, the more I suspect that ATT just sent me a device with a broken IMEI. My EFS backup from when I first got CM7 says the generic IMEI and has the product code line completely broken anyhow.
I would be very appreciative if someone could post the segment of their working NV_DATA.bin from address 00188000 to 00188030 so that I can correct mine to what it should be; the 188008 fix frequently linked to on this forum did not finish the job.
EDIT: I just noticed that my EFS backups seem to be tied in SOME way to the CSC flashed to the phone... Does anyone have the latest I897 ATT CSC?
Click to expand...
Click to collapse
You can dl the firmware from www.samfirmware.com
I don't know about all g the latest leaks, but I know kf1 has the csc file in it.
Or
Download t the Odin 3 file version of KF1 in my sig.I it has it in there. If you aren't registered at samfirm, that would be the easiest way.

mrhaley30705 said:
You can dl the firmware from www.samfirmware.com
I don't know about all g the latest leaks, but I know kf1 has the csc file in it.
Or
Download t the Odin 3 file version of KF1 in my sig.I it has it in there. If you aren't registered at samfirm, that would be the easiest way.
Click to expand...
Click to collapse
Just as an update:
The samfirmware.com site is going to be defunct soon (end of 2011), and all its information will move to a new site: www.sammobile.com. If you had a samfirmware account, you'll have to re-register at the new site. Sounds like they'll have all the firmware at the new place like before, just a new name/site.

jmtheiss said:
Just as an update:
The samfirmware.com site is going to be defunct soon (end of 2011), and all its information will move to a new site: www.sammobile.com. If you had a samfirmware account, you'll have to re-register at the new site. Sounds like they'll have all the firmware at the new place like before, just a new name/site.
Click to expand...
Click to collapse
Thanks for the heads up.

Update:
I fixed the IMEI from mobiletechvideo.com, and still get the same signal problem.
I only receive 1 bar or no bar signals on T-mobile.

tennyleaz said:
Update:
I fixed the IMEI from mobiletechvideo.com, and still get the same signal problem.
I only receive 1 bar or no bar signals on T-mobile.
Click to expand...
Click to collapse
Because you don't get 3G on T-mobile with the Captivate...
Sent from my I897 using xda premium

b-eock said:
Because you don't get 3G on T-mobile with the Captivate...
Sent from my I897 using xda premium
Click to expand...
Click to collapse
No, I'm not meaning data connection. I know I will get edge only.
I mean the phone signal itself is very unstable, sometimes no signal at all.

Well try flashing different modems... I will help you through this.
Sent from my I897 using xda premium

b-eock said:
Well try flashing different modems... I will help you through this.
Sent from my I897 using xda premium
Click to expand...
Click to collapse
I'm trying a few modems from this thread: http://forum.xda-developers.com/showthread.php?t=1300843
Most of them have very poor signal or no signal at all. Few can have 1~2 bars of signals sometimes.
I tried those until now:
je5 0~2 bars
jf1 no service
jf6 no service
jh2 0~1
jh3 0~1
jh7 0
ji6 no service
jj4 1~2
jl1 0~2
jl2 no service
kb1 0
ke3 0
kf1 0~2
How I use the modems is download them into sdcard and flash through CWM. Do I miss something?
Or any other issue I didn't notice?

Have you tried RAT selection? This is a workaround for RAT on I897 modems.

[Q] Just bought a captivate, No Signal is displayed and baseband version is "unknown"

[Q] Just bought a captivate, No Signal is displayed and baseband version is "unknown"
Please, I need your help, I just bought a Captivate for my GF, we live in Honduras, Central America and the phone was supposedly sent unlocked, she inserted the sim card and the phone did not asked for any code, but, it has no signal, it is currently displaying "no Service", and when she goes to look at her baseband version, It displays "unknown"!
It has a crappy ICS rom, since Im an Nexus one owner I dont know a thing about this phone version!
Can you PLEASE! help me?
Can I just flash a CM nightlie over this ****ty ICS rom?
Do I have to upgrade or downgrade anything else?
Please, any help is welcome!

I assume you probably have, but are the APN settings correct?

You can probably flash a CM7 nightly over it. Worst case, it doesn't work and you have to flash back to stock first and try again.
It sounds like you don't have a working modem. If flashing CM7 doesn't fix it, flash a CM7-compatible modem and see if that fixes it.
Sent from my SGH-I897 using xda premium

apbthe3 said:
You can probably flash a CM7 nightly over it. Worst case, it doesn't work and you have to flash back to stock first and try again.
It sounds like you don't have a working modem. If flashing CM7 doesn't fix it, flash a CM7-compatible modem and see if that fixes it.
Sent from my SGH-I897 using xda premium
Click to expand...
Click to collapse
Lolz good advice...just in the wrong order...
I would flash the modem first....cause it is the least invasive (doesn't wipe anything) and most likely will work.
Roms contain modems, so if fishing as ROM didn't fix it fishing a modem after that is just spinning your wheels.
BUT, since op doesn't even like the ROM...just flash to kk4 stock.
I would also make door that the phone is actually unlocked...but aosp doesn't have the same dialer codes to just dial and check, and i don't know those.

studacris said:
Lolz good advice...just in the wrong order...
I would flash the modem first....cause it is the least invasive (doesn't wipe anything) and most likely will work.
Roms contain modems, so if fishing as ROM didn't fix it fishing a modem after that is just spinning your wheels.
BUT, since op doesn't even like the ROM...just flash to kk4 stock.
I would also make door that the phone is actually unlocked...but aosp doesn't have the same dialer codes to just dial and check, and i don't know those.
Click to expand...
Click to collapse
I agree that it is less invasive, but he already said he wanted to go to CM7 so I figured he could skip a step if the flash actually worked. He bought the phone this way so who knows what the previous owner did to it. Both ways should fix his issue though (unless his phone is locked, as you pointed out).
If you flash to the most recent nightly or a kang, the Samsung dialer codes work to check your lock status.
Sent from my SGH-I897 using xda premium

So, thank you guys for helping me, heres what I did:
A friend told me that since I had ICS on it, I had to flash a compatible modem on it, I flashed I9000BVJJPD which is used on cm9.
When it turned on, It asked for an unlock pin, I tried to generate it with the SGSunlock app but didnt worked, so I downgrade it to cm7 (2.3.7) and tried again but with no success...
Tomorrow morning Ill take it to an unlock shop so it can be unlocked (hopefully).
Does the modem that I flashed is the correct one for a network that uses 850 bands?
I heard that some captatives erased the imei causing the "unknown baseband" issue, I dialed *#06# and it retrieved the imei code so, it isnt ****ed right?
any help is welcome, Ill let you guys know how it goes.
thanks!

donchele said:
Does the modem that I flashed is the correct one for a network that uses 850 bands?
Click to expand...
Click to collapse
Yes, JPD should support 850.

apbthe3 said:
Yes, JPD should support 850.
Click to expand...
Click to collapse
Up to you, which is the best modem out there?

No such thing..every phone acts differently, not to mention the signal at your location is a huge variable we can't factor in.

studacris said:
No such thing..every phone acts differently, not to mention the signal at your location is a huge variable we can't factor in.
Click to expand...
Click to collapse
I know, but, for example, developers say that the lastest is the best, but, you only can say if you test them...
But, have you test some of them? Which gave you the best result?

I always include jk4 in my roms as a good standard.

donchele said:
I know, but, for example, developers say that the lastest is the best, but, you only can say if you test them...
But, have you test some of them? Which gave you the best result?
Click to expand...
Click to collapse
I understand your dilemma. You look at a list of 50 modems and go, "Where do I even start?"
Personally, I have tried lots of different modems, old and new, and I always come back to KP1. I think it's worth adding to your list of modems to try out. I would also try JJJV5 and KG3.

donchele said:
So, thank you guys for helping me, heres what I did:
A friend told me that since I had ICS on it, I had to flash a compatible modem on it, I flashed I9000BVJJPD which is used on cm9.
When it turned on, It asked for an unlock pin, I tried to generate it with the SGSunlock app but didnt worked, so I downgrade it to cm7 (2.3.7) and tried again but with no success...
Tomorrow morning Ill take it to an unlock shop so it can be unlocked (hopefully).
Does the modem that I flashed is the correct one for a network that uses 850 bands?
I heard that some captatives erased the imei causing the "unknown baseband" issue, I dialed *#06# and it retrieved the imei code so, it isnt ****ed right?
any help is welcome, Ill let you guys know how it goes.
thanks!
Click to expand...
Click to collapse
If the imei is still present it's good. Did you check the imei displayed is the same on the sticker under the battery?
Did you try the SGS Unlocker website with the nv_data.bin ? http://www.communityhosting.net/sgsunlock/

studacris said:
I always include jk4 in my roms as a good standard.
Click to expand...
Click to collapse
apbthe3 said:
and I always come back to KP1. I think it's worth adding to your list of modems to try out. I would also try JJJV5 and KG3.
Click to expand...
Click to collapse
Thanks, you guys rock, Ill the 3 that you mentioned here and let you know which one is my best...
Ill Compare Battery life, Reception and data...

I9000L no signal issue.....

Well, just as the title says. I have an I9000L in here that has no signal. Thought it might be an issue with csc files since it was updated to ICS, but then i flashed it back to gingerbread and nothing change. I used the stock rom with no luck, problem is that it shows imei, baseband and everything in place. Thinking it might be a hardware problem to this point. But i oppened it and everything seems in place. Just wondering if it may have a burned baseband chip. But then again it shows the baseband version so my guess is thats not the case. Could someone help me on this???

enelyam said:
But then again it shows the baseband version so my guess is thats not the case. Could someone help me on this???
Click to expand...
Click to collapse
Check your network settings
menu.settings>wireless and networks > mobile networks
or try https://play.google.com/store/apps/...SwxLDEsImNvbS5ha3ZlbG9uLnNpZ25hbHRyYWNrZXIiXQ..

Nope, no luck with the apk. Neither checking network or anything like that. The phone will just not allow me to do so. Like i said, the weird thing is that everythin seems to be working fine. I have an efs backup so i deleted the nv_data.bin to check if the phone is creating a new one and it is. It shows baseband, imei and everything. im starting to guess its a hardware failure but then again. The phone is almost brand new. I mean it was bought not too long ago. It was unlocked, and after flashing it shows multiple csc contents. I have fix something similar to this by applying the PCT csc(Claropr csc). But this time nothing is working...

The reason you didn't have a signal on ics is probably due to the fact you didn't flash a modem from here http://forum.xda-developers.com/showthread.php?t=1158783
[CM7/MIUI/ICS/CM9][06.01.12] Modems + Bootloaders(MD5)
So it might be worth going back to ics, doing that to get your signal back, and then reverting to Sammy Rom to see if that sorts it....btw there are no csc files on aosp/cm9 Roms

Okay thanks M8, one other thing. Initially the phone had signal on ICS. It was DOCs ICS if i can remember. I think that custom firmware will flash a new modem? Or not? And is it possible that it had signal and lost it because of that? Anyways thanks i will give it a try then....

enelyam said:
Okay thanks M8, one other thing. Initially the phone had signal on ICS. It was DOCs ICS if i can remember. I think that custom firmware will flash a new modem? Or not? And is it possible that it had signal and lost it because of that? Anyways thanks i will give it a try then....
Click to expand...
Click to collapse
Some ics Roms do, some don't, you can always flash another in recovery of the one that comes with Rom is no good for your region

ALWAYS make sure you are using the right radio for your phone. It solves many network issues

Ok then so i guess it might be a hardware issue if thats the case. Because i have use that rom before on a i9000 and never seen something like this. Hummm! Ive done just about everything and i cant still get signal. Goshhh! I rather have the phone showing no baseband or something than dealing with this....

You have checked your apn settings haven't you?!

Yeap M8 APN settings are correct. But in fact APN settings have nothing to do with the cell phone signal in terms of calls. If your phone is working it will receive the signal. The APN settings as far as im concerned will just set the internet and mms settings. Maybe with them set the phone will try to reach the towers(Antennas) but anyways the APN settings are correct.

HELPP!!!! Searching..

I keep getting searching on my signal when i put my sim card in but it has bars... How do I fix this? And it keeps saying to register to network and when i do it says its not available..

Hey
Have you checked your IMEI number to make sure the phone is not blacklsited? Dial *#06# and then input that number into www.swappa.com/esn and or www.checkesnfree.com and hat'll tell you.
If you need help with anything and find out you're black listed (which it sounds like you are) or just have questions feel free to Message me.

twill1987 said:
Have you checked your IMEI number to make sure the phone is not blacklsited? Dial *#06# and then input that number into www.swappa.com/esn and or www.checkesnfree.com and hat'll tell you.
If you need help with anything and find out you're black listed (which it sounds like you are) or just have questions feel free to Message me.
Click to expand...
Click to collapse
My IMEI is not blocked...

Could be a damaged NV file. If you're clean imei and everything that would typically indicate damaged software to me. Have you tried flashing stock firmware to the phone? That might help repair the damage, afterwards perform a factory reset and wipe cache. A .qcn file written over a smart card usually fixes those connectivity issues. Just some ideas.

twill1987 said:
Could be a damaged NV file. If you're clean imei and everything that would typically indicate damaged software to me. Have you tried flashing stock firmware to the phone? That might help repair the damage, afterwards perform a factory reset and wipe cache. A .qcn file written over a smart card usually fixes those connectivity issues. Just some ideas.
Click to expand...
Click to collapse
Tried that also, did an Odin to 5.0.1 didn't work so i attempted to try it all the back to kit kat and still nothing..

baller1 said:
I keep getting searching on my signal when i put my sim card in but it has bars... How do I fix this? And it keeps saying to register to network and when i do it says its not available..
Click to expand...
Click to collapse
Does this happen everywhere or just where you are now? we need more info.
Is it unlocked? what model is it?

boostnek9 said:
Does this happen everywhere or just where you are now? we need more info.
Is it unlocked? what model is it?
Click to expand...
Click to collapse
It is a 910T which means its for T-Mobile and I have T-Mobile, it has signal bars but no service it says searching the whole time and this happens everywhere i go and it does not catch anything. I have odin flashed, I have done a modem flash but still nothing works.

I know you're saying your IMEI isn't blocked, but did you 100% check here?
http://www.t-mobile.com/verifyIMEI.aspx

baller1 said:
It is a 910T which means its for T-Mobile and I have T-Mobile, it has signal bars but no service it says searching the whole time and this happens everywhere i go and it does not catch anything. I have odin flashed, I have done a modem flash but still nothing works.
Click to expand...
Click to collapse
The first thing I'd do is ODIN to restore to 100% stock ( I know you've done it but I'd do it again.. make sure you put it in download mode with the 3 button combo, not any other way.) on the stock rom, do you have this issue?

boostnek9 said:
The first thing I'd do is ODIN to restore to 100% stock ( I know you've done it but I'd do it again.. make sure you put it in download mode with the 3 button combo, not any other way.) on the stock rom, do you have this issue?
Click to expand...
Click to collapse
Been on stock to fix this issue but nothing has worked.. There obviously no other way to odin the phone unless if its in download mode which i did.. I'm thinking hard ware issues

Did you do a nandroid by any chance? I had the same issue when I flashed a Rom, it corrupted my IMEI, nothing worked until I restored from my backup..

Were did you get this device??
Flashvetrin

no service?

I just got the note 4, rooted it and flashed a rom, however I have no service it shows. I am using Metropcs and it shows "no service" no matter what I try, if I take the sim card out then it will show the logo that there is no sim card inserted so it does recognize it at least. The sim card and service works fine in my other phones but I can't figure out how to get it to work on here.

Check ESN on Swappa??

macasus76 said:
Check ESN on Swappa??
Click to expand...
Click to collapse
I have checked the ESN and it comes back as clean.

theinspector said:
I have checked the ESN and it comes back as clean.
Click to expand...
Click to collapse
What is the model number? And in "settings/ about device/status" does your number, IMEI, Network state or network show up?

macasus76 said:
What is the model number? And in "settings/ about device/status" does your number, IMEI, Network state or network show up?
Click to expand...
Click to collapse
The model number is the N910T3 version, it does show my number, it lists the IMEI and for all of the network state related stuff it lists it as "UNKNOWN."

Are you still on TEKXodus? If you came from an older version ie..4.4.4 or whatever then I'd suggest Odin flashing 5.1.1 stock, see if you get service then try flashing the custom rom again. Might be a mismatch in baseband and all that. Open dialer and punch in these numbers *#12580*369#*and make sure everything matches. Also run thru the thread you found the rom and make sure you flashed everything suggested.

macasus76 said:
Are you still on TEKXodus? If you came from an older version ie..4.4.4 or whatever then I'd suggest Odin flashing 5.1.1 stock, see if you get service then try flashing the custom rom again. Might be a mismatch in baseband and all that. Open dialer and punch in these numbers *#12580*369#*and make sure everything matches. Also run thru the thread you found the rom and make sure you flashed everything suggested.
Click to expand...
Click to collapse
I tried Odin flashing the stock 5.1.1 firmware and had no luck, also used Samsung Kies firmware to try and go back to stock as well just in case that would solve anything and I have no luck. It just shows " (No Service) " When I look in the status bar, and it still says it isn't registered.

And when you open dialer and input this *#12580*369# everything matches?

macasus76 said:
And when you open dialer and input this *#12580*369# everything matches?
Click to expand...
Click to collapse
I'll go ahead and attach an image as well to show. Yes everything seems to match up when I input that in the dialer.

Sorry I wasn't doubting your word lol, honestly I'm kinda stumped as well, almost seems to be network locked. Is it a Metro branded phone or Tmobile? I wouldn't think that would matter. Wish I was more help fella

macasus76 said:
Sorry I wasn't doubting your word lol, honestly I'm kinda stumped as well, almost seems to be network locked. Is it a Metro branded phone or Tmobile? I wouldn't think that would matter. Wish I was more help fella
Click to expand...
Click to collapse
It is a T-Mobile brand phone, which I figured wouldn't matter much anyways, I've owned a few T-Mobile phones in the past and have had no issues using Metro Pcs even if the phone was locked because T-Mobile does own them. That's perfectly fine, thank you for giving some suggestions anyways that I hadn't thought of.

The Apn checks out? In settings?
U could also try flashing a data fix for the international roms. Maybe last resort try a new sim

Like the guy above said have you checked apn settings? You could also try in the mobile setting where it says Network Operators and then Search Now and let it search. Choose Tmobile if it pops up or if MetroPCS pops up choose that. If you need MetroPCS apns I have them since I'm on MetroPCS. Let me know if you've fixed this because I haven't rooted yet and plan to root and install Tekxodus rom but if this is a problem then I'll just stick with stock unroot. I have the N910T tmobile brand if that matters

APN settings have really nothing to do with his dilemma, my question would be this for the OP. Please check if the IMEI number matches the one that's on the back of the phone under the battery. I have a work around but i need to verify.

I went through the same problem coming from TekXodus rom. I tried everything and no luck. Flashed 5.1.1 stock and called tmobile about it. after their tech guy didnt know anything else i could try they sent me a replacement.
And now here I am again

I also flashed tekxodus from my wifes 4.4 phone. Now no sim card issue. Same as op.
Edit: flashed the correct baseband. All good over here.
Sent from my SM-N920T using Tapatalk