[Q] Signal problems after installing custom ROM - Galaxy S III Q&A, Help & Troubleshooting

Hello,
I've been facing this problem for days now, tried almost everything and still no luck, so I'm sorry if it's been asked before, but I'm truly hopeless.
Right now, my SGS3 works only on stock ROMs. Every time I try to install a custom ROM (JB or KK) I have a problem with the signal - either baseband, IMEI and everything is "unknown", or everything is good (IMEI not "0049...", there are full correct APNs) but it still displays the "error while searching for networks" message.
Fortunately (as I realized on other threads),I can always go back to square one, flash a stock 4.3, with no problems with IMEI or anything, but, you know, stock sucks.
I tried installing every modem I ran into, but nothing helped. Is there a secret step from stock to custom on samsung devices I'm skipping (I'm an ex-nexus user...)?

+1
Same problem, no solution until now

oriwass said:
Hello,
I've been facing this problem for days now, tried almost everything and still no luck, so I'm sorry if it's been asked before, but I'm truly hopeless.
Right now, my SGS3 works only on stock ROMs. Every time I try to install a custom ROM (JB or KK) I have a problem with the signal - either baseband, IMEI and everything is "unknown", or everything is good (IMEI not "0049...", there are full correct APNs) but it still displays the "error while searching for networks" message.
Fortunately (as I realized on other threads),I can always go back to square one, flash a stock 4.3, with no problems with IMEI or anything, but, you know, stock sucks.
I tried installing every modem I ran into, but nothing helped. Is there a secret step from stock to custom on samsung devices I'm skipping (I'm an ex-nexus user...)?
Click to expand...
Click to collapse
When you install a custom rom, based on samsung 4.3, do you have emergency calls only/no network?
If yes, install Boeffla kernel 5.3/or beta 5.4 because Boeffla is a patched kernel i.e. it can read patched modems, and then install a patched modem .
From the on you will have your network (no emergency calls/no network problem) and signal should be good.
But first backup your EFS and store it on a very safe location, you have ann app for that, k-Tool on Playstore (requires root).

Related

[Q] GT-I9305 has multiple issues

My Galaxy S3 GT-I9305 LTE was running Liquid Smooth 2.37. Recently I lost notification and phone ring sounds and now I have lost baseband and I have no cell signal.
In the phone's 'about' section the baseband field is empty. Android version showing is 4.3.
I'm not quite sure what I did wrong, first to try and get back the sounds and then baseband, I have been playing around with various custom and stock ROMS and kernals to get full functionality back.
I've read tons of help posts but nothing works.
Here's a few of the things I've tried with results in brackets, used CWM recovery to restore working backup (failed 'unsupported file' message),
reflashed kernals (neither Boeffla nor yank555 have worked, wipe/data restore in CWM (it still takes me back to 4.3 with no baseband).
I thought I'd re-flash back to the phone's original stock ROM using Kies, but the weird thing is Kies doesn't restore, it upgrades to the latest 4.3 ROM which fails to restore baseband.
I wanted to send the phone back to the 4.1.2 it came with or was it an earlier ROM? I can't remember as I didn't note it down, I bought the phone second hand, it arrived loaded with a stock ROM for Australia's Optus network. I promptly rooted and flashed the phone to Liquid Smooth and the phone ran fine for months on the 2 Degrees Network in New Zealand.
Anyway, I must have tried reflashing a dozen stock roms I've found online using Odin. Some of them partially work, I get sound back, (it seems only the 4.3 ones work, with the german I9305XXUEMKC reliably loading - it even gives me a NZ english install option) but don't restore the baseband
. All the ones I've found for Optus are rejected, I get the 'unsupported device' or status 7 error in Odin.
So I decided to flash one that works, install cwm, root the phone and try installing different baseband kernals to fix the (probably corrupt) efs.
But I'm going round in circles trying to root the phone. Using CWM, supersu shows as successfully installed, but when I boot into the OS root checker shows my phone is not rooted. Knox seems to obstruct every attempt I make to disable it as well. I keep getting these 'knox stopped etc...from working messages'.
I'm sorry if my description is a bit confusing, I'm happy to clarify anything.
I'm at my wits end. I want to try everything before I have to ship the phone off to a repairer who may charge me hundreds of dollars to fix the phone.
This is I9300 not I9305 Q&A
Use the report button and ask a mod to move to the correct forum .
I can offer no help as i fail to understand the post .
As said before you are in wrong place and are not giving us a clear question to answer. If its a root problem there are fixes for it. Status 7 error is discussed in many threads. Flashing MG4 modem fixes efs problem. Downgrading causes problem. Learn to search before making a thread.

i9300 no service/ no sim card/ no gps fix /efs / IMEI trouble - FIXED

This might help someone having these no service/ no sim card no GPS fix issues with the galaxy SGSIII i9300, that might have to do with efs folder change and IMEI corruption.
Okay so i solved these no service issues and ill share my experience so maybe someone will find it helpful.
So the issue has to do with the famous efs folder conundrum, though tbh im not a developer so i cant say exactly what was the issue or even be a 100% sure it was the efs folder.
So I got me a used malfunctioning i9300 which i then repaired at a lab and proceeded to install a new TW based ROM, my first mistake was not backing up efs folder and creating a nandroid, but i havnt realized that yet. After flashing, I noticed that i have no GPS, but i didnt know if the GPS was working with original firmware because i neglected to check that or back it up, so i decided to put a pin in it for the time being and went on to check out some ROMs.
At first, I flashed couple of JB tw based roms, all was well (except for the gps), then i started to check out some KK roms, those didnt play well with my device, I got no service in every single rom i tried, You name it ive tried it, none fixed the service issue. Moreover i also tried a few JB AOSP based ROMs, among them the 4.3 JB PAC-man ROM, those had the same no service/no sim issues. Meanwhile whenever i un-root and flash with odin back to stock or restore a nandroid i made while on 4.3 foxhound ROM (with service working and a supposedly good copy of the efs folder) service is restored. I would also mention that I had more backups of the efs from the working “foxhound” i made with different tools and when i restored these folders when on a ROM with no service it didnt fix the issue.
Here are the solutions ive encountered and tried that didnt work:
-restoring efs with efs pro, samsung tool, efs backup -restore cmd tool.
-flashing latest firmware and flashing back to KK
-flashing all kinds of modems (those pre efs folder change (XXEMG4) and those after)
-flashing latest TWRP/CWM recovery
-flashing kernels
-trying to edit “nv_data.bin” with hex editor
-some more ways in trying to manipulate the efs folder.
-using samsung service codes on stock, which i found regarding this issue, except from the *#06# code, for imei, pretty much none worked for me.
Its important to mention that when on stock firmware or a JB TW based ROM i would see my baseband version in settings and when I tried the *#06# code for checking my imei it gave me a serial number with many digits that I assumed was indeed my correct IMEI number, and when i was on KK ROMs or non TW JB ROMs i would get the same popup with no numbers and in settings i would see “unknown baseband” .
To add to that, whenever i rooted and installed a KK ROM or a JB non TW ROM and tried to restore efs with efs professional i would get a message the device is not perm rooted (but thats neither here nor there).
This research took me about 5-6 days and the end of which i was ready to give up on having a KK rom or a non TW rom for that matter, NOTHING seemed to fix the problem. I just had some fight in me for one more hopeless attempt. I read somewhere that a flashing of cm 10.1 and then going to settings -> more and there change some network stuff from this to that would help -
(Originally Posted by Goose306 on s3forums.com)
"flash back to another AOSP 4.2 ROM (CM10.1, Liquid, etc.)
Got to Network settings. You need to change Roaming to automatic and CDMA settings to RUIM/SIM (I *think* that is the name of it, I'm actually on TW temporarily as I'm troubleshooting some SDcard issues of my own)
Reboot and you should be back in business. Touchwiz doesn't have a way of changing of those settings which is why ODIN/stock doesn't fix it"
I said what the heck thats simple enough. I flashed CM 10.1.3 for i9300 and went into the settings but the options i read about werent the same as the settings i saw in my case,
so i did move one settings around in the settings-> more section, cant remember what it was and im on a different ROM by now,
it was nothing i knew about anyway (but you should give it a go and have a look, there are few options to choose from so you can eliminate your way to what makes sense).
I then went on to recovery to flash carbon rom 4.4 and to my enormous surprise i had service and connection and to my astonishment i also got back the GPS as a bonus ! yay ! I bet you forgot about that too by now…
This ends on a weird note though, though everything is at working order now and the IMEI number i get is the same as the one i get when on stock rom,
it does not match the number on the back of the phone under the battery. well mehh.. as long is its working.
Hope this helps someone.
You didnt mention that exact step. Changing "something from this to that" doesn't really count as being helpful.
Thanks for the post anyways.
~ RazorMC
RazorMC said:
You didnt mention that exact step. Changing "something from this to that" doesn't really count as being helpful.
Thanks for the post anyways.
~ RazorMC
Click to expand...
Click to collapse
Youre right, i couldnt find the thread that had the suggestion to install the 10.1 cm but my point was it didnt even apply to my situation because the options in "Setting -> more" werent compatible with what was suggested in the thread so i had to improvise and I just changed some setting i cant remember in "Settings -> More" but I realise that it would be more helpfull to say what i changed there exactly, but im not on cm 10.1 anymore and cant see what in there now.. the good news is that there werent many options to change there.
But i did went out and looked for the original comment that made me try this an it says -
(Originally Posted by Goose306 on s3forums.com)
"flash back to another AOSP 4.2 ROM (CM10.1, Liquid, etc.)
Got to Network settings. You need to change Roaming to automatic and CDMA settings to RUIM/SIM (I *think* that is the name of it, I'm actually on TW temporarily as I'm troubleshooting some SDcard issues of my own)
Reboot and you should be back in business. Touchwiz doesn't have a way of changing of those settings which is why ODIN/stock doesn't fix it"
so in my case i didnt see these exact same options so i changed what seemed to me the most related to the issue at hand.
I dont think i had to touch the roaming, again i dont have CM 10.1 installed so i dont recall exactly what were my options.
is it a solution mostly for Qualcomm chipset based I9300 ? someone can say ? European providers use different frequencies I guess hence different chipsets and parameters.
Olek94 said:
is it a solution mostly for Qualcomm chipset based I9300 ? someone can say ? European providers use different frequencies I guess hence different chipsets and parameters.
Click to expand...
Click to collapse
mine is the international version but as i mentioned it didnt work like described but the end result was the same. I f you have the LTE version Im not sure which option youre going to get in CM 10.1 settings -> more , but if youre having trouble with service and GPS and stuff like that i do suggest you try flashing CM 10.1 (compatible with LTE - not sure how it goes with CM and LTE compatibility) and check if you got the same options to make the changes to, if not, try and improvise based on what makes even a little sense, thats what i did.
It might be that the flashing of CM 10.1 itself is what fixes the problem, so if you change nothing it might help still, anyway this is pretty simple and quick to do so better start here than starting with other messier solutions.
help
hi i was on stock 4.1.2 then i rooted flashed twrp recovery using toolkit and flashed revolutionary 5 4.3 straight away i didn't backup efs i know it was dump thing to do but i was new to galaxy s3 flashing so basically i f***k up. then i flashed official 4.3 firmware using odin.now i have a network reception but can't make or attend calls.i was thinking to go back to 4.1.2 in hope of getting things to work. please help n reply asap!! thanks
5668892 1021
jabirrockzzz said:
hi i was on stock 4.1.2 then i rooted flashed twrp recovery using toolkit and flashed revolutionary 5 4.3 straight away i didn't backup efs i know it was dump thing to do but i was new to galaxy s3 flashing so basically i f***k up. then i flashed official 4.3 firmware using odin.now i have a network reception but can't make or attend calls.i was thinking to go back to 4.1.2 in hope of getting things to work. please help n reply asap!! thanks
Click to expand...
Click to collapse
I believe I shared every bit of helpful information i can share with you about this issue and my process of handling it in the main message of the thread, Read the entire thing and the comments followed, then follow my suggestion, if you wish to do so.
samuelaviv said:
mine is the international version but as i mentioned it didnt work like described but the end result was the same. I f you have the LTE version Im not sure which option youre going to get in CM 10.1 settings -> more , but if youre having trouble with service and GPS and stuff like that i do suggest you try flashing CM 10.1 (compatible with LTE - not sure how it goes with CM and LTE compatibility) and check if you got the same options to make the changes to, if not, try and improvise based on what makes even a little sense, thats what i did.
It might be that the flashing of CM 10.1 itself is what fixes the problem, so if you change nothing it might help still, anyway this is pretty simple and quick to do so better start here than starting with other messier solutions.
Click to expand...
Click to collapse
Thank you, I was suspecting that you have a similar version than me. Well, in desperate cases anything can be tested (But some have told me not to mess with US versions as there is a risk of burning something )
Anyway the last version I could not flash , the CM 10.1 it was ejected with a file error soon despite 3 downlowd.
I will try with another more compatible version with Cyanogen.
Have a nice day
samuelaviv said:
This might help someone having these no service/ no sim card no gps fix issues with the galaxy s3 i9300, that might have to do with efs folder change and IMEI corruption.
Okay so i solved these no service issues and ill share my experience so maybe someone will find it helpful.
So the issue has to do with the famous efs folder conundrum, though tbh im not a developer so i cant say exactly what was the issue or even be a 100% sure it was the efs folder.
So I got me a used malfunctioning i9300 which i then repaired at a lab and proceeded to install a new TW based rom, my first mistake was not backing up efs folder and creating a nandroid, but i havnt realized that yet. After flashing, I noticed that i have no gps, but i didnt know if the gps was working with original firmware because i neglected to check that or back it up, so i decided to put a pin in it for the time being and went on to check out some roms.
At first, I flashed couple of JB tw based roms, all was well (except for the gps), then i started to check out some KK roms, those didnt play well with my device, I got no service in every single rom i tried, You name it ive tried it, none fixed the service issue. Moreover i also tried a few JB AOSP based roms, among them the 4.3 jb pac-man rom, those had the same no service/no sim issues. Meanwhile whenever i un-root and flash with odin back to stock or restore a nandroid i made while on 4.3 foxhound rom (with service working and a supposedly good copy of the efs folder) service is restored. I would also mention that I had more backups of the efs from the working “foxhound” i made with different tools and when i restored these folders when on a rom with no service it didnt fix the issue.
Here are the solutions ive encountered and tried that didnt work:
-restoring efs with efs pro, samsung tool, efs backup -restore cmd tool.
-flashing latest firmware and flashing back to kk
-flashing all kinds of modems (those pre efs folder change (xxemg4) and those after)
-flashing latest twrp/cwm recovery
-flashing kernels
-trying to edit “nv_data.bin” with hex editor
-some more ways in trying to manipulate the efs folder.
-using samsung service codes on stock, which i found regarding this issue, except from the *#06# code, for imei, pretty much none worked for me.
Its important to mention that when on stock firmware or a JB TW based rom i would see my baseband version in settings and when I tried the *#06# code for checking my imei it gave me a serial number with many digits that I assumed was indeed my correct IMEI number, and when i was on kk roms or non tw JB roms i would get the same popup with no numbers and in settings i would see “unknown baseband” .
To add to that, whenever i rooted and installed a kk rom or a jb non tw rom and tried to restore efs with efs professional i would get a message the device is not perm rooted (but thats neither here nor there).
This research took me about 5-6 days and the end of which i was ready to give up on having a KK rom or a non TW rom for that matter, NOTHING seemed to fix the problem. I just had some fight in me for one more hopeless attempt. I read somewhere that a flashing of cm 10.1 and then going to settings -> more and there change some network stuff from this to that would help -
(Originally Posted by Goose306 on s3forums.com)
"flash back to another AOSP 4.2 ROM (CM10.1, Liquid, etc.)
Got to Network settings. You need to change Roaming to automatic and CDMA settings to RUIM/SIM (I *think* that is the name of it, I'm actually on TW temporarily as I'm troubleshooting some SDcard issues of my own)
Reboot and you should be back in business. Touchwiz doesn't have a way of changing of those settings which is why ODIN/stock doesn't fix it"
I said what the heck thats simple enough. I flashed CM 10.1.3 for i9300 and went into the settings but the options i read about werent the same so i did move one settings around in the more section, cant remember what it was but it was nothing i knew about anyway, then went on to recovery to flash carbon rom 4.4 and to my enormous surprise i had service and connection and to my astonishment i also got back the GPS as a bonus ! yay ! I bet you forgot about that too by now…
This ends on a weird note though, though everything is at working order now and the IMEI number i get is the same as the one i get when on stock rom it does not match the number on the back of the phone under the battary.
Hope this helps someone.
Click to expand...
Click to collapse
:crying: :crying: :crying: :crying: :crying: Dude!!!!! I understand!!!!
I had a similar experience only I also tried flashing CM 10.1 and it did not work. Although I have another imei, I have all my services running on the Stock 4.3. Now the only problem is that if I change to any other rom, does not connect to the wifi network.
I found something like this: http://forum.xda-developers.com/showthread.php?t=839367&page=4
But neither worked. Yesterday I tried to repartition the phone and almost killed. I spent two weeks looking for a solution, and tried them all, but did not work, I think I will draw on the last and the only thing I think work ... The box.
The octopus box (or similar).
KK roms are beautiful ... but no matter what, I have no wifi in another rom than the stock 4.3 lol.
Thank you for your contribution! as you say: I hope you serve someone else.
VIOShero said:
:crying: :crying: :crying: :crying: :crying: Dude!!!!! I understand!!!!
I had a similar experience only I also tried flashing CM 10.1 and it did not work. Although I have another imei, I have all my services running on the Stock 4.3. Now the only problem is that if I change to any other rom, does not connect to the wifi network.
I found something like this: http://forum.xda-developers.com/showthread.php?t=839367&page=4
But neither worked. Yesterday I tried to repartition the phone and almost killed. I spent two weeks looking for a solution, and tried them all, but did not work, I think I will draw on the last and the only thing I think work ... The box.
The octopus box (or similar).
KK roms are beautiful ... but no matter what, I have no wifi in another rom than the stock 4.3 lol.
Thank you for your contribution! as you say: I hope you serve someone else.
Click to expand...
Click to collapse
yeah thats some BS those signal and issues on the i9300.. they really did a number on that one.
sorry my thing didnt help, i too tried everything and got nothing.
Maybe try flashing CM 10.1.3 and changing those options in settings-> more, Might be that just flashing CM 10.1 wont do it, I did change something ther but cant remember what it was, i wrote in my post what someone else had ther in the options but i had different ones but I still changed one option there ( what i thought might be connected to the issue ).
anyway dude i feel you its crying shame whole thing, and so many are posting about these issues all the time, im kinda hating on samsung cause they always seem to mess up like that.
Hope you solve this somehow..

[Q] Galaxy SII: Error While Searching for network- On all custom roms

hey guys!
I have samsung galaxy s2 gt-I9100. Whenever I install a custom rom, everythings works fine but i am not able to use mobile network and i received "Error while searching for networks" when I go to settings>>Mobile networks>>network operators. The IMIE number is fine.
I have tried many roms including:
--cm-10.1.3-i9100
--cm-11-20140804-SNAPSHOT-M9-i9100
--pa_i9100-4.42-20140708
--pa_i9100-4.45-20140729
--Slim-i9100-4.4.4.build.9.0-OFFICIAL-8301
The last rom which worked fine was RootBox-JB-i9100-V4.0. All roms released after this rom have this issue.
I have searched for issue on google and tried various solutions but so far no success.
Please Help!
And can you guys suggest me any rom which is not based on CM?
Go to settings-->about phone and look for "Baseband version"
If it says "unknown" or similar you may need to reflash the modem before you flash the rom.
Or even worse you might need to do a reboot (it actually worked once).
Also do emergency calls work? If yes then it might be a problem with your sim card or you contract (or just bad luck).
ruleh said:
Go to settings-->about phone and look for "Baseband version"
If it says "unknown" or similar you may need to reflash the modem before you flash the rom.
Or even worse you might need to do a reboot (it actually worked once).
Also do emergency calls work? If yes then it might be a problem with your sim card or you contract (or just bad luck).
Click to expand...
Click to collapse
The Baseband version is visible and a valid one. Also my sim works on stock rom or any other phone.
SInce I have no idea what the cause could be, here are some random things to try out, of which one might work:
-make sure you're not in airplane mode
-do a full complete wipe
-try a different sim (and see if it works)
-make sure the sim is not upside down
-fully shutdown the phone (e.g remove battery for a day [maybe not that long])
-clean contacts between sim and phone (how? no idea)
-try (even-) more roms (if there are any left)
-test a few kernels
-maybe look through the logcat (if it actaully outputs something worthwhile)
As you can see none of these "soloutions" are based on.....uhmm....anything(?). But at least....if none of them work, you know what not to do.
faizi97 said:
The Baseband version is visible and a valid one. Also my sim works on stock rom or any other phone.
Click to expand...
Click to collapse
Perhaps you could flash back to stock rom then flash custom rom again, that way all modem files and network related files can be fixed/re-installed. By any chance have you tried changing modems? It might not help you but it's a suggestion.

[Q] Don't know what's wrong with my phone's imei

Ok, so I used to have cm11 installed, but it got sort of buggy in the long run.
I decided to try Foxhound rom, just for kicks... When it was finished installing, I got the default IMEI and the phone wouldnt connect to the network. I found a way to fix this (without backing up my efs folder), by installing an old rom. After that, I installed ef extreme rom (the one with the s5 ui).. It was supposed to be the most stable and smooth rom... But the camera and hotspot wouldnt work -_- ... I never understood why.
Anyhow, the problem is, now that Im trying to get off that crappy touchwiz rom, I NEVER get service anymore. My IMEI will always go blank.. Now the baseband goes "unkown" too (which hadnt happened before)... For ****s sake, I was trying to go back to my old cm11, and still, crazy IMEI... However, if i install the old rom all over again and the region modem: boom, mobile network works again... I dont understand why it fails to work after i have gotten it fixed over and over again...
I even made a backup of my efs folder when the mobile network is working (on the old rom.. Revolution HD)... When i restore it on newer roms, the IMEI and everything comes back.. however, it wont let me access the network (radio off?)
WTF can i do? Im desperate for help, please!!
@niko: standard is to get your actual firmware from sammobile.com & flash it with Odin … to get a stable base.
Your device serial number is probably corrupted. You can use service box to fully repair this issue. Or you can flash Ariza's patched modem. It will work but your efs folder will be permanently screwed and you will be forced to flash it every time you flash a new firmware.
____________________________________________
P3110 / I9300 / I9100 / NEXUS 5 / iPAD2

No Cellular on Custom ROM

I had my s2 hard bricked and now i got a new motherboard for it, the thing is that on all stock roms (2.3 and 4.1.2) the phone works perfectly but all the custom roms 4.4 5.0 6.0 the cellular does not work, it gives me no service, tried flashing modem from cwm but no change.
i also tried different recoveries etc but custom rom no service
sometimes in custom rom imei used to be blank but it comes back after reboot, in stock no issues at all
any idea what im doing wrong or is there something up with the new board?
thanks,
Update
I was searching and I read somewhere that installing NeatROM by Sale will help, i downloaded and installed it, the good news is that cellular works and i have full 3G access.
Question: How to proceed further?
i could experiment but the thing is that if i flash a non-working rom (no cellular), i will have to flash stock from odin and start all over again
any ideas?
Update 2
i tried NeatROM and it worked perfectly, then i tried installing slimLP and boom, no service again, this time,my IMEI was blank too, so now i'm flashing stockrom again.
any idea anyone please?

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