Develop Bugs

[Q] Why am I not getting signal at all...anywhere?

I just got a G2. perm rooted it. and everytime upon booting up it has signal for 1 second then literally just disappears and never comes back. can't choose mobile network or anything because it can't search for it. tried doing *#*#infor#*#* and it says GSM ONLY and everytime i try to change it to WCDMA PREFERRED it keeps reverting back as soon as i exit. the only way i've been able to get signal back so far is to connect to wifi and enable wifi calling, then after disconnecting i'm able to get signal and i'm able to check the WCDMA PREFERRED option but awhile ago i was on wifi calling then left my house and it was disconnected but wasn't able to get signal again.
can anyone help me with what i should do because although i might be able to get it back through wifi calling, this will be very problematic whenever i'm not near my normal wifi locations...
thanks for the help

Eh... I would try reinstalling a stock rooted rom.
Sent from my T-Mobile G2 running Cyanogenmod.

... also try a diff SIM.
EDIT..... Which method did you use to root?

ddotpatel said:
... also try a diff SIM.
EDIT..... Which method did you use to root?
Click to expand...
Click to collapse
I used the thread "temp to permanent root, using rage instead of visionary"
Sent from my T-Mobile G2 using XDA App

Is it factory unlocked? Have you used an unlock code? Have you tried the full radio s off, super Cid thing?
Sent from my HTC Vision using XDA App

I wonder if your SIM card is faulty, needs cleaning, or is just a bit loose in the socket.

steviewevie said:
I wonder if your SIM card is faulty, needs cleaning, or is just a bit loose in the socket.
Click to expand...
Click to collapse
This is what it sounds most like to me. Also try to install another rom since you have it rooted now and see if that fixes the issue. Make sure you do a Nandroid backup first though!

ddotpatel said:
Is it factory unlocked? Have you used an unlock code? Have you tried the full radio s off, super Cid thing?
Sent from my HTC Vision using XDA App
Click to expand...
Click to collapse
I never put an unlock code and I'm still on tmobile. I called them and so far I haven't had trouble with signal as much but my number doesn't show up under status in about phone settings...it just says unknown. Its only on this phone though, my n1 shows my number with this sim.
Sent from my HTC Vision using XDA App

Just so we're clear.. Did this phone/sim combo work OK before your rooted the phone?

dadewy said:
Just so we're clear.. Did this phone/sim combo work OK before your rooted the phone?
Click to expand...
Click to collapse
No it wasn't. For the past couple of days since calling tmobile, its been significantly better but today I did randomly have that same problem of no connection, but mostly right now my problem is my g2 not being able to read my phone number in "status" under "about phone" settings but it does on my n1. When I called tmobile they tried sending my number ota 3 times with no luck...
Sent from my HTC Vision using XDA App

During the first 30 days you can go to a TMO store and get a new phone, pretty much "no questions asked". I'd go ahead and do that if I was you. Oh, go to a corporate store though, not a mall kiosk.
While you're there, get a new SIM, too. All free of charge.
If you still have the same problem after that, I'd try an exorcist

Is this problem solved now ? I got the same problem but have no chance to return it back.
If there is the way to solve it, could you please inform and share
Thx

hersam said:
Is this problem solved now ? I got the same problem but have no chance to return it back.
If there is the way to solve it, could you please inform and share
Thx
Click to expand...
Click to collapse
My signal problems seemed to be resolved, at least for the past week. It was resolved by calling tmobile customer support and they did some tests. However, my phone not recognizing my phone number under settings> about phone> status, is still a problem. Even tried getting a new sim and still didn't solve the problem. Did numerous OTAs with tmobile that didn't work. My number still shows up on caller id and stuff its just that menu thing. Sounds insignificant but some apps use that to determine your phone number. Also, when putting my sim back into my nexus one, it does show my number...
Sent from my HTC Vision using XDA App

Nevermind, my other problem was just resolved after reading a post in the cm6.1.1 thread. Settings-call settings-additional settings-my phone number.
Sent from my HTC Vision using XDA App

[Q] S3 on Bell: not registered on network

hi everyone,
I got my S3 from Bell two weeks ago, it worked fine most of the time including calls, sms and data.
but occasionally for whatever reason the phone cannot make call or send sms, no ring for incoming call also. it shows "not registered on network" when I try to dial. at the time showing this error, there was signal on the bar.
maybe after long time, it can registered itself into network again, but most of the time, I just restart the phone and it works fine again.
I called Bell and they asked me to replace the SIM card, so I did, but I still see this error. So I think it is not SIM issue.
anyone has idea what the cause could be? or is there anyway to fix it?
I tried to search online before I ask, just couldn't find a solution so far.
so post here and hope anyone can help,
thanks for the help in advance.

I've had this issue as well.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

I had this problems with rogers as well. Same as you I contacted rogers they told me to remove the sim and replace it. Worked for a while but kept happening. I got fed up and rooted then installed kyan rom and haven't had the problem since. Not sure if it was rom based or if the factory reset before flashing resolved the issue but haven't had it since. Hope someone figures this out though because it's annoying especially on a new phone that is stock.
Sent from my SGH-I747M using Tapatalk 2

Good to hear you had fixed it.
I might try factory reset to see what happen.
healer82 said:
I had this problems with rogers as well. Same as you I contacted rogers they told me to remove the sim and replace it. Worked for a while but kept happening. I got fed up and rooted then installed kyan rom and haven't had the problem since. Not sure if it was rom based or if the factory reset before flashing resolved the issue but haven't had it since. Hope someone figures this out though because it's annoying especially on a new phone that is stock.
Sent from my SGH-I747M using Tapatalk 2
Click to expand...
Click to collapse

Had this problem on bell a few times the first 2 weeks I had my phone. Went to the bell store and without hesitation they told me to change the mobile network mode from gsm/hspa+/lte
To just gsm/hspa+.
Reason given was the Lte network where I was using my phone (west island, montreal) wasn't strong enough. So my phone would switch between networks until eventually it got in that state. Personnaly I think the problem was more signal penetration into the computer lab I work in.
It's been 2 weeks stable so far. A co-worker reported the same problem to me last week and he took my advice and hasn't had the problem since.
Sent from my SGH-I747M using xda app-developers app

Thank you very much for the tip. I was wondering that too, because I noticed that the network icon at top bar keep changing between H+ and LTE by itself. and I wonder why too.
I will try and see what happened.
thanks
uglyren said:
Had this problem on bell a few times the first 2 weeks I had my phone. Went to the bell store and without hesitation they told me to change the mobile network mode from gsm/hspa+/lte
To just gsm/hspa+.
Reason given was the Lte network where I was using my phone (west island, montreal) wasn't strong enough. So my phone would switch between networks until eventually it got in that state. Personnaly I think the problem was more signal penetration into the computer lab I work in.
It's been 2 weeks stable so far. A co-worker reported the same problem to me last week and he took my advice and hasn't had the problem since.
Sent from my SGH-I747M using xda app-developers app
Click to expand...
Click to collapse

SAMSUNG i747M not registered on network
I had this samsung s3 i747M from canada. Got it unlocked here in Pakistan. Placed a local sim in it. It recognizes the sim, registers it, makes calls, but then after a while, it shows "not registered on network". i restart, it registers network again, then loses it again. It keeps doing it. sometimes it is registered on network, but can't make or receive calls.
I have tried a number of things but the problem is not resolved and i'm fed up to the point that i want to throw this phone away.
The original rom had android 4.3
here's the list of things i have tried.
* changed the network mode to "GSM only" and "WCDMA/GSM (auto connect)" - NO USE
* Factory data reset a few times - NO USE
* tried a custom rom (it was so bad, i deleted it, don't even remember the name) - NO USE
* stock rom 4.4.2 from "sammobile.com" - NO USE
* tried flashing different modems from "http://forum.xda-developers.com/showthread.php?t=1831898" - NO USE
* tried changing the options from *#2263# to my network's specifications - NO USE
* tried sims from different networks - NO USE
PLEASE IF SOMEONE CAN HELP ME OUT HERE, I'M DESPERATE

@qamar_ish, what ROM is on your Samsung phone?

Originally it came with android 4.3. Currently it has this kitkat rom, which i downloaded from "sammobile.com".
the filename is this:
I747MVLUFNK2_I747MOYCFNK2_I747MVLUFNK2_HOME.tar.md5
It said on the webpage that it is the stock rom for SGH-i747M
audit13 said:
@qamar_ish, what ROM is on your Samsung phone?
Click to expand...
Click to collapse

Maybe flash the latest 4.4.2 ROM?

Thats what it is. it is the 4.4.2 rom, but the problem persists.
audit13 said:
Maybe flash the latest 4.4.2 ROM?
Click to expand...
Click to collapse

Does your carrier require an AWS-compatible phone? Does the i747m support all frequencies provided by your provider?

I'm not sure about whether an AWS phone is required or not. But it certainly supports all the frequencies provided by the networks here. I checked it by using the code *#2263# and the options have the frequency supported by my networks here, that is "ufone" and "warid"
PS. I'm not an expert on this thing, whatever i'm doing, i learnt it during the last week..
audit13 said:
Does your carrier require an AWS-compatible phone? Does the i747m support all frequencies provided by your provider?
Click to expand...
Click to collapse

It looks like your phone does support your carrier's frequencies.
Does your phone show the imei# from the dialpad? Is it possible there is something wrong with the phone's imei #?

It does show the correct imei when i dial *#06#. It had lost its imei initially when i got it unlocked, but got it fixed from someone.

qamar_ish said:
It does show the correct imei when i dial *#06#. It had lost its imei initially when i got it unlocked, but got it fixed from someone.
Click to expand...
Click to collapse
Do you know why it lost the imei during the unlock process? Does the imei # in the phone match the imei # on the label under the battery?

I dont know how it lost imei. The guy who fixed it said that the imei is corrupted and he fixed it. Now it shows the same imei as on the back of the device.

I have never had a Samsung phone lose the imei if the phone was unlocked using a code, assuming that is how your phone was unlocked.
Did you try re-injecting the imei with the efs folder? It can be done using nvwriter.

Ok. I will try that. Can u guide me how to do it? Or share a link or something.
And thanx for helping me out here man..

Link: http://forum.xda-developers.com/showthread.php?t=1804117

[Q] Signal drops to nothing seconds after booting phone

Alright so my s3 worked fine for months then all of a sudden it wouldnt get signal.. when i reboot the phone it has full signal (i can make a call or send tects) but only for a few seconds then it drops to nothing.. under the status menu it says mobile network status connecting and never changes.and when i try and search for carriers it just says searching and nothing ever happens.
ive tried absolutely everything i can think of.. ive flashed the stock 4.1.1 rom ive edited the apn settings ive even flashed a couple different versions of the modem but the same thing happens.. ive even completely changed carriers!!!
plllllease help! im ready to throw this thing against a wall.. and im getting sick of paying for a phone that doesnt work!

Did you put a pin or something in any holes in the back of your phone near the battery? I gave a suggestion, but it's a last resort. LAST resort.
Sent from my SAMSUNG-SGH-I747 using xda premium

Do you mean like some sort of reset button??

Just as another possibility.... your phone didn't drop it's IMEI number, did it?

elementaldragon said:
Just as another possibility.... your phone didn't drop it's IMEI number, did it?
Click to expand...
Click to collapse
That's what I was wondering.
Sent from my SAMSUNG-SGH-I747 using xda premium

How would I tell if its dropped the imei??

th0ms0n1 said:
How would I tell if its dropped the imei??
Click to expand...
Click to collapse
Is your IMEI still showing? And the same as behind your battery?
Did you make sure your APN is the same as your carrier's?

alright so my imei was showing 0... i followed some steps in another thread and now its showing my imei again (same as on the back of the phone) but the same problem is still there.. signal drops to nothing within seconds of restarting the phone. any other ideas?
Thanks

th0ms0n1 said:
alright so my imei was showing 0... i followed some steps in another thread and now its showing my imei again (same as on the back of the phone) but the same problem is still there.. signal drops to nothing within seconds of restarting the phone. any other ideas?
Thanks
Click to expand...
Click to collapse
Did you check your APN?
Did you try other modems?

yes ive tried multiple modems and set the apn setting for my carrier.. although i thought it should still connect to the network without apn settings and just the data wouldnt work.
ive looked through a ton of other threads and ive seen alot of people talking about .nv_data files in the efs folder.. when i use root explorer i dont see any .nv_data files in that folder

th0ms0n1 said:
yes ive tried multiple modems and set the apn setting for my carrier.. although i thought it should still connect to the network without apn settings and just the data wouldnt work.
ive looked through a ton of other threads and ive seen alot of people talking about .nv_data files in the efs folder.. when i use root explorer i dont see any .nv_data files in that folder
Click to expand...
Click to collapse
No, you need APN no matter what to have signal and data. Did you try deleting all your APNs and adding your carrier's LTE APN?

Hmm well I dont think Its an apn problem.. the Phone connects to the network. But only for A Couple seconds then goes hours of having no service but will periodically connect again for A few seconds

th0ms0n1 said:
Hmm well I dont think Its an apn problem.. the Phone connects to the network. But only for A Couple seconds then goes hours of having no service but will periodically connect again for A few seconds
Click to expand...
Click to collapse
I have the same problem, it's super annoying.

Same here
I'm having the same problem. It happened when i was flashing a bunch of different roms and then i restored my phone from a nandroid backup and it failed.. Then i started having this problem.. I haven't found any way of fixing it.. Sometimes the signal will even come back.. But not for more then a few seconds

ELIZA itywmen
th0ms0n1 said:
Alright so my s3 worked fine for months then all of a sudden it wouldnt get signal.. when i reboot the phone it has full signal (i can make a call or send tects) but only for a few seconds then it drops to nothing.. under the status menu it says mobile network status connecting and never changes.and when i try and search for carriers it just says searching and nothing ever happens.
ive tried absolutely everything i can think of.. ive flashed the stock 4.1.1 rom ive edited the apn settings ive even flashed a couple different versions of the modem but the same thing happens.. ive even completely changed carriers!!!
plllllease help! im ready to throw this thing against a wall.. and im getting sick of paying for a phone that doesnt work!
Click to expand...
Click to collapse
Okay after weeks of trying to fix this problem your experiencing, I've finally fixed the issue! .. Basically all you have to do is follow the guide here to fix your imei #. (MAKE SURE YOU DO THIS CORRECTLY) http://forum.xda-developers.com/showthread.php?t=1801997 . Anyway, after you do that, call AT&T and then tell them your phone is having trouble with service and its going in and out. They're going to try to resync your phones IMEI number with their towers. After they do that your phone will work like it used to..

NOTE II - Emergency Calls Only - Help Needed

Note II randomly has emergency call only ... i have signal bars but cant use phone text data anything
- i reset to stock rom via odin (only flashed a pda) - didn't fix
-tried another sim in it - same result
- my sim works
- phone is not stolen
- factory reset
- checked APN
- Airplane mode, reboot etc. all done
anybody have any ideas how i got to this? just switched from an iphone kinda dissapointed right now .thanks for help!

What did you do prior to having this problem?? Did you flash a Rom? And it started a lil while after that? Kinda need lil more info.
Is the phone used? Could b many things.
I'll say this if you just got the phone, and it's from a retail store return it and get another one.
Sent from my SAMSUNG-SGH-I317 using Xparent SkyBlue Tapatalk 2

Ignore me
Sent from my SAMSUNG-SGH-I317 using Tapatalk 2

More info...we need more info....
Did you check your modem ??
Did not see that on your list of repairs....and if it's wrong....no data.
Was your Odin rom complete with the baseband ????

I am having the exact same problem.
I literally didn't do anything for this to start happening. I use the I317 model of the Note 2 (obviously)
In the past couple of weeks, I am constantly losing reception for long periods of time and getting the same emergency calls only message.
I have bars as well, but don't see HSPA+ or LTE arrows... indicating data.... I don't receive texts / texts won't send.... etc. Can't use data reliant programs.
I'm beginning to get severely annoyed. Reception will eventually lock back on after about 2 hours.. .and I'll get all my alerts at once etc...
Very very annoying, why is this happening. I never did anything

This has happened to me twice.
The first time I had to restart the phone.
The second time I just tried again and it worked.
It was about two weeks between occurrences.
Never rooted.
Running stock UCAMA4.
No idea how to help you I just know what happened to me.

Network changes and downtime are not uncommon either as they upgrade and change often.
Not sure really, just thinking out loud. ...g

The only time this happens to me is when I forget to pay the bill...
Sent from my SAMSUNG-SGH-I317 using Tapatalk 2

LittleRedDot said:
The only time this happens to me is when I forget to pay the bill...
Sent from my SAMSUNG-SGH-I317 using Tapatalk 2
Click to expand...
Click to collapse
Donno how this helps?

twanskys204 said:
Donno how this helps?
Click to expand...
Click to collapse
Piss off.
Sent from my SAMSUNG-SGH-I317 using Tapatalk 2

twanskys204 said:
Donno how this helps?
Click to expand...
Click to collapse
+1 :thumbup:
It's always the same no positive response!!!
Sent from my SAMSUNG-SGH-I317 using Xparent SkyBlue Tapatalk 2

I'm having the same problem as the original user. Here's the background:
I bought an AT&T unlocked phone to use with my T-Mobile account. Worked fine.
Decided to root it & remove bloatware.
Immediately upon rooting, I noticed several problems, including no network access. Decided to restore to original condition.
Flashed the complete factory default, from SamMobile, using Odin. Upon completion did a factory reset.
Most of the bugs caused by original rooting seemed to be solved. But still cannot make calls.
Upon turning it on, I get the "no network access" symbol, then I get bars, but only a couple. Any calls yield "emergency calls only" message.
I unlocked the phone again to make sure that hadn't been undone, but no change.
If I go to settings, more settings, mobile networks, network operators, default settings, manual; then it finds AT&T and 3116600.
If I do the same to my spouse's phone (same phone, same network, just never rooted) it also finds T-Mobile.
How do I get my phone to find the T-Mobile network again?
Please keep in mind that I am very green at this. All I know is what I have learned from reading online material for the last two weeks, so please try to offer any instructions as clearly and simply as possible. Thank you very much!

If the phone says "no sim inserted", your sim tray might be defective (happened to me)
if it says no network access (emergency calls only) then theres some other problem

It doesn't say anything about the sim. And actually it doesn't say anything about the network. When I first turn it on, the "no" icon (zero slash) displays in the tray. Then it gets some bars, but if I dial a call, it displays "emergency calls only".

lol guys....
UncleChewie said:
It doesn't say anything about the sim. And actually it doesn't say anything about the network. When I first turn it on, the "no" icon (zero slash) displays in the tray. Then it gets some bars, but if I dial a call, it displays "emergency calls only".
Click to expand...
Click to collapse
same problem here ...and same problem 2 weeks ago.... and onesly i soved this but i don t remeber how.... now i try and when i we succseed i will tell you how.
in my opinion is a rom - modem problem..... connection... because not allroms are compatible with alll modem .... i willwrite sooon i solve this ...this night .... hoplly not all the night ...

Emergency calls only
I have same situation. I downloaded firmware from switzerland, then at first it looks working,then I saw the problem which is,
phone cannot connect to operator.
instead when I search for mobile networks it can find it,but cant connect.Then I realised the firmware I used did simlock on my phone
After that I tried all firmwares which is related with my region Turkey. it did not work.
I went to phone tecnical shop to repair it. They fixed it,BUT I could not upgrade sammsung software,because its modified firmware. Even if I want to change firmware again I am having same connection problem. I asked the guy who fixed the phone,how did he repaired, he said only way that to fix it,we have to have sammsungbox, sambox,or I have to change motherboard he said.

UncleChewie said:
I'm having the same problem as the original user. Here's the background:
I bought an AT&T unlocked phone to use with my T-Mobile account. Worked fine.
Decided to root it & remove bloatware.
Immediately upon rooting, I noticed several problems, including no network access. Decided to restore to original condition.
Flashed the complete factory default, from SamMobile, using Odin. Upon completion did a factory reset.
Most of the bugs caused by original rooting seemed to be solved. But still cannot make calls.
Upon turning it on, I get the "no network access" symbol, then I get bars, but only a couple. Any calls yield "emergency calls only" message.
I unlocked the phone again to make sure that hadn't been undone, but no change.
If I go to settings, more settings, mobile networks, network operators, default settings, manual; then it finds AT&T and 3116600.
If I do the same to my spouse's phone (same phone, same network, just never rooted) it also finds T-Mobile.
How do I get my phone to find the T-Mobile network again?
Please keep in mind that I am very green at this. All I know is what I have learned from reading online material for the last two weeks, so please try to offer any instructions as clearly and simply as possible. Thank you very much!
Click to expand...
Click to collapse
If the phone is unlocked it should find T mobile just fine but, you will not have 3g unless you flash the aws mod to use tmobile 3g. My note is unlocked and when I put a tmobile sim in it takes a few minutes for it to connect to the tmobile network.
Once you unlock a phone rooting and flashing roms won't affect the sim unlock.
Sent from my SAMSUNG-SGH-I317 using XDA Premium 4 mobile app

Cunay,
What did u fix exactly. I have a similar problem
Sent from my SAMSUNG-SGH-I317 using xda premium

Try this...
Just a thought but you can try shutting down phone, pulling out SIM card and gently use a pencil eraser to clean the gold contacts on it. Make sure that you blow/brush off any eraser particles. Put SIM back in and make sure it is in there correctly. Power on and hope for the best. Unless your service is shut down seems most "Emergency Calls Only" errors are from SIM card issues. May have to replace the SIM. No guarantees but worth a shot

Worldgod said:
Just a thought but you can try shutting down phone, pulling out SIM card and gently use a pencil eraser to clean the gold contacts on it. Make sure that you blow/brush off any eraser particles. Put SIM back in and make sure it is in there correctly. Power on and hope for the best. Unless your service is shut down seems most "Emergency Calls Only" errors are from SIM card issues. May have to replace the SIM. No guarantees but worth a shot
Click to expand...
Click to collapse
Worldgod,
I am using a new SIM i got it last week as a check, with same results, weak signal that frequently drops especially indoors.
Thxs

SGSII wont connect to T-Mo

So had a SGSII, flashed to CM 10.1.2. It had been working before and it had worked last week to call but didnt use it because data wasnt added onto that line yet.
This week, put the sim in, i see the signal bar greyed out with bars.. then empties out again.. it just keeps repeating this... like it wont connect. i tried that SIM card in another phone.. even another SGSII, both work. just this specific SGSII doesnt. I put another sim card into this SGSII, does same thing. I've tried clearing cache/restore to factory and flashing new rom. but doesnt work either
anyone have had this problem before?

iandroo888 said:
So had a SGSII, flashed to CM 10.1.2. It had been working before and it had worked last week to call but didnt use it because data wasnt added onto that line yet.
This week, put the sim in, i see the signal bar greyed out with bars.. then empties out again.. it just keeps repeating this... like it wont connect. i tried that SIM card in another phone.. even another SGSII, both work. just this specific SGSII doesnt. I put another sim card into this SGSII, does same thing. I've tried clearing cache/restore to factory and flashing new rom. but doesnt work either
anyone have had this problem before?
Click to expand...
Click to collapse
Go to about phone and check ur baseband, if it doesn't end in uvmc6 u need to flash the newest jellybean radio, just Google uvmc6 tmo jb radio DL it and flash in recovery, also check ur imei #, if it says unknown u might have a blacklisted device...
Sent from my SAMSUNG-SGH-T989 using XDA Premium 4 mobile app

soupysoup said:
Go to about phone and check ur baseband, if it doesn't end in uvmc6 u need to flash the newest jellybean radio, just Google uvmc6 tmo jb radio DL it and flash in recovery, also check ur imei #, if it says unknown u might have a blacklisted device...
Sent from my SAMSUNG-SGH-T989 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
sounds good. ill try when i can. what does it mean if its blacklisted? any way to get it off that list?

blacklisted = meaning someone sold someone else a phone and waited a few days/weeks/maybe even months to call tmobile or carrier and report there phone stolen or lost aka IMEI shutdown .....now they (the seller) profit 2 ways a new phone from carrier and then cash from the buyer

krazierokz said:
blacklisted = meaning someone sold someone else a phone and waited a few days/weeks/maybe even months to call tmobile or carrier and report there phone stolen or lost aka IMEI shutdown .....now they (the seller) profit 2 ways a new phone from carrier and then cash from the buyer
Click to expand...
Click to collapse
oh no we didnt do that. the phones are all ours. just being passed from person to person. we never called tmobile.

ok so then like @soupysoup said you should check your baseband(RADIO) and make sure the last digits are MC6 for the radio flash this see if your signal comes back http://goo.im/devs/Void_Dweller/SGH-T989_UVMC6_radio.zip

woo flashing the radio worked O_O