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No reception after flash with cwm.

I upgraded from icssgs 3 to 4.2 abd ever since i get no reception at all. No data, no calls no nothing. Wifi works though.
I have tried since and flashing several different roms and the problem persists. Has anyone had this problem before or does anyone have a possible solution?
Sent from my GT-I9100 using XDA App

Have you tried factory reset, cache wipe, advanced and dalvik cache wipe, and then re-flashing rom? Are you using teamhacksung build 16?

risking to sound stupid, by " No data, no calls no nothing" you mean "no signal"?
if you've tried the solution suggested by am2012, have you tried installing a different modem?

try flashing a modem...u can get one from here
http://forum.xda-developers.com/showthread.php?t=1158783&highlight=bootloaders

I have tried wiping and reflashing. I have also tried flashing different roms with different modems.
I reflashed the last rom that worked but the problem persisted.
I have had thoughts of flashing a rom with odin instead of cwm but i dont know if it should make a difference?
Thanx for the replys btw, all help is very appreciated.
Sent from my GT-I9100 using XDA App

Try wiping and resetting everything. Then put phone into download mode and odin a stock ROM. Then if things work start working again with your signal, flash rc4.2 again. I have flashed loads of ics roms and never had a problem I couldn't fix by going back to stock ROM. Try 2.3.6 the 'leaked one' from Sammobile.
By the way, you have got a i9000 international version haven't you?
Sent from my GT-i9000 using XDA App

Hey, just realised you have i9100. Have you used the right ROM for your phone? Does icssgs release for i9100?
Sent from my GT-i9000 using XDA App

Is ur imei at its place ???

If you've got an sII then icssgs is never going to work - go back to sII rom.
If you've got an sI then as sbnaul pointed out it is most probably your IMEI. Some users found their IMEI changed when upgrading to 4.2
Hopefully you've taken a backup of your efs - if so just copy the backup imei file over.
If not, there is still hope - flash stock gb 2.3 back onto the phone - this should restore the imei. Then take a backup of the efs folder, flash 4.2 and copy your backed up imei into efs

Thanks for the help.
I have 2 phones, one internarional sgs and an international s2.
I mostly use the s2 but i want the sgs to work nonetheless
Im gonna try reflashing the stock, i dont have any efs backups or such:/
I have been looking for a good stock rom but didnt find a good one. Im gonna look for the leaked sammobile release though so thanks for that.
How do i take the needed efs backup? Is it through cwm?
Thanks!
Sent from my GT-I9100 using XDA App

Modem Issue
ScrotzaN said:
I upgraded from icssgs 3 to 4.2 abd ever since i get no reception at all. No data, no calls no nothing. Wifi works though.
I have tried since and flashing several different roms and the problem persists. Has anyone had this problem before or does anyone have a possible solution?
Sent from my GT-I9100 using XDA App
Click to expand...
Click to collapse
I'm quite sure that this is a modem issue...
If you know, which ROM were you using previous to ICS where the reception was fine, then you can flash that modem.
(For eg.: it was 2.3.6 XXJVU in my case. So, I would require a JVU modem)
Here is a concise list of all the modems: http://forum.xda-developers.com/showthread.php?t=1158783

aaprocks said:
I'm quite sure that this is a modem issue...
If you know, which ROM were you using previous to ICS where the reception was fine, then you can flash that modem.
(For eg.: it was 2.3.6 XXJVU in my case. So, I would require a JVU modem)
Here is a concise list of all the modems: http://forum.xda-developers.com/showthread.php?t=1158783
Click to expand...
Click to collapse
Yes, I have tried that but it doesnt work.
But now I flashed the stock rom and I got the reception back. So now Im gonna root and try to backup the efs folder.
Thanks alot everybody to answered the thread.

There we go. Now it works again. I didnt even have to restore the efs folder.
I just flashed the stock rom, rooted and then flashed icssgs 4.2 and now it works.
Thanks everyone

full wipe , flash new rom worked for me

I've heard if you flash a stock ROM with Odin, then the problem with the IMEI (efs folder) is often done. Is this right?

Saimen2 said:
I've heard if you flash a stock ROM with Odin, then the problem with the IMEI (efs folder) is often done. Is this right?
Click to expand...
Click to collapse
Yup... that does the job...

Cant connect to ATT (no calls, no data) and cant save new APNs after upgrading to JB

I upgraded last night to Jelly Bean using these instructions: http://forum.xda-developers.com/showthread.php?t=1775373&page=11 . The last ROM i had flashed was a gingerbread Apex ROM a long time ago, and I think it had i9000 bootloaders (I think this because an i9000 screen pops up first thing when i turn it on, before the devil kernel logo pops up). I ran in to some issues while upgrading so I used Heimdall 1 click without bootloaders to get me back to stock gingerbread and then when I flashed Jelly Bean and the Devil Kernel everything worked (camera, music, etc.) except it doesn't detect any wireless carrier, APNs aren't saved, it doesn't detect when I take my SIM card out, and it also shuts down randomly. I suspect the problem is with the i9000 bootloaders, but what I have read on this forum makes me think installing new bootloaders is somewhat dangerous so I wanted to get advice before I tried anything else. How should I try to fix this? And if I do need new bootloaders, what is the safest way?
Thanks

ahurley said:
I upgraded last night to Jelly Bean using these instructions: http://forum.xda-developers.com/showthread.php?t=1775373&page=11 . The last ROM i had flashed was a gingerbread Apex ROM a long time ago, and I think it had i9000 bootloaders (I think this because an i9000 screen pops up first thing when i turn it on, before the devil kernel logo pops up). I ran in to some issues while upgrading so I used Heimdall 1 click without bootloaders to get me back to stock gingerbread and then when I flashed Jelly Bean and the Devil Kernel everything worked (camera, music, etc.) except it doesn't detect any wireless carrier, APNs aren't saved, it doesn't detect when I take my SIM card out, and it also shuts down randomly. I suspect the problem is with the i9000 bootloaders, but what I have read on this forum makes me think installing new bootloaders is somewhat dangerous so I wanted to get advice before I tried anything else. How should I try to fix this? And if I do need new bootloaders, what is the safest way?
Thanks
Click to expand...
Click to collapse
I don't think it's the bootloaders..I've flashed a jb rom with i9000 boot loaders and I had sim card and data working.. try going back to stock GB, do the whole rooting process, then flash cm9 ics, after that flash JB
Sent from my SGH-I897 using xda premium

zzmomo73 said:
I don't think it's the bootloaders..I've flashed a jb rom with i9000 boot loaders and I had sim card and data working.. try going back to stock GB, do the whole rooting process, then flash cm9 ics, after that flash JB
Sent from my SGH-I897 using xda premium
Click to expand...
Click to collapse
Will do as soon as I get home from work. Should I use the same Heimdall method?

While you are in Ginger Bread, you should back up your EFS Folder. I believe that your IMEI was changed in the flash process, and the network could not recognize your phone. In should a case, you could copy the backup of your EFS folder to your JB phone, and restore the IMEI.

kafepuya said:
While you are in Ginger Bread, you should back up your EFS Folder. I believe that your IMEI was changed in the flash process, and the network could not recognize your phone. In should a case, you could copy the backup of your EFS folder to your JB phone, and restore the IMEI.
Click to expand...
Click to collapse
I used titanium backup before I flashed, and also copied all of the contents of my internal and external sd cards to my computer before tinkering with things. So do I already have my EFS Folder? If so, how do I restore it? And if not, how do I back it up when I get back to GB?

For anyone else that might come across this problem, I solved it by flashing this modem, then flashing the kernel again

temporary fix to get data to work: toggle airplane mode off/on

fermata_ said:
temporary fix to get data to work: toggle airplane mode off/on
Click to expand...
Click to collapse
my wifi is not working! ive tried toggling airplane mode on and off but wont work!

Modem reflash worked for me: Thanks!
AHurley: - Thanks for linking to that file, the reflash fixed my issue as well!

Signal Issues

Hi, I am new to xda and i'm also quite new to the flashing process. I have a captivate i896 and successfully flashed a rom on to my phone. However after doing so the phone is unable to connect to my mobile carrier. I have also tried to install a modem from the stickied thread how ever it gives me an error::
cwm 3.0.zip error
i'm going to try to flash the helly bean rom in hopes of getting that fixed.
also in the about phone section it says baseband is unknown... ive googled that and it said my IMEI is corrupted or something or other.

It sounds like your /efs folder is messed up. There's a thread in the Development section that goes through steps on how to restore you /efs and IMEI all on the phone.

jmtheiss said:
It sounds like your /efs folder is messed up. There's a thread in the Development section that goes through steps on how to restore you /efs and IMEI all on the phone.
Click to expand...
Click to collapse
I can't seem to find the thread... Would you happen to have a link to it?
also!
I'm very lost right now, still cant seem to install any modems on and i checked in the EFS folder, there isn't anything

Please check first if your IMEI shows up in the about phone and that it is the same as the one on the inside of your device. For modems there are diffrent ones depending on what ROM you have flashed so give us that info please. Lastly if your IMEI is diffrent give this a try http://www.xda-developers.com/andro...s-ii-and-other-samsung-devices-in-nine-steps/, i have not used this my self but might be what you need

sunfirestorm said:
Please check first if your IMEI shows up in the about phone and that it is the same as the one on the inside of your device. For modems there are diffrent ones depending on what ROM you have flashed so give us that info please. Lastly if your IMEI is diffrent give this a try http://www.xda-developers.com/andro...s-ii-and-other-samsung-devices-in-nine-steps/, i have not used this my self but might be what you need
Click to expand...
Click to collapse
IMEI shows up as 'unknown'. I flashed the latest cm10 and used the modem KG3 under I9000.
Also, I'm in Toronto, so I'm running the i896 captivate.
i rooted and installed CWM by following the steps in this link http://forum.xda-developers.com/showthread.php?t=1350266
then after when i installed cm10 the IMEI dispapeared

sorry bump. but i think the problem is that i an unable to install the modem.. if anyone can please guide me to install a modem that would be very nice. ive tried to install it through CWM but it gives me a status 0 error everytime i try

lyk2 said:
IMEI shows up as 'unknown'. I flashed the latest cm10 and used the modem KG3 under I9000.
Also, I'm in Toronto, so I'm running the i896 captivate.
i rooted and installed CWM by following the steps in this link http://forum.xda-developers.com/showthread.php?t=1350266
then after when i installed cm10 the IMEI dispapeared
Click to expand...
Click to collapse
lyk2 said:
sorry bump. but i think the problem is that i an unable to install the modem.. if anyone can please guide me to install a modem that would be very nice. ive tried to install it through CWM but it gives me a status 0 error everytime i try
Click to expand...
Click to collapse
If your IMEI shows unknown in the settings menu then it has nothing to do with whether the modem will flash or not. It means your efs folder was wiped. Now you could in fact be without a modem too but you need to fix the IMEI first.
Now with updating to CM10 theres a good chance it made a backup of this for you. Look on your internal SD card for a folder simply labeled backup. If so look in it and see what it has. Hopefully it will contain another folder labeled efs. If thats the case too then all you need to do is get something like root explorer or ghost commander and copy the contents of that folder into /efs in your system.
That will fix the IMEI issue.
As far as modems go you will only be able to flash these... http://soggycashew.weebly.com/cm7miui--ics-modems.html All the rest will give errors when you try to flash.

[RESOLVED] Help restoring /efs folder

Greetings!
I apologize if there has been a similar thread, but I couldn't find anything that worked, so here I go:
I flashed to the official XWJW1 firmware (which I got from here: http://forum.xda-developers.com/showthread.php?t=1102881) successfully, I then proceeded to root it by flashing Semaphore 2.7.4, again successfully. I then booted into CWM recovery and flashed Slim-I9000-4.2.2.build.3-OFFICIAL.zip. The first time, the phone rebooted almost immediately and got stuck at the boot screen, which I assume was because it installed the new Semaphore kernel only, so I removed the battery, went back into recovery mode (this time it was indeed the new version of CWM) and reflashed the ROM successfully. I installed Slim_Gapps.4.2.2.build.8.zip as well and booted into SlimBean. All is working great apart from the "minor" problem of no mobile network. I went in the settings > mobile networks > network operators and got "Error while searching for networks". I went to check the information under About Phone and saw this:
Baseband version unknown
I read it could be due to messed up /efs folder, so I reflashed the official XWJW1 rom (with working network and correct baseband version), rooted it and copied the /efs folder (using ES File Explorer and Superuser). I installed the SlimBean rom again (still no network and no baseband version info) and tried replacing the /efs folder: first with the AROMA file manager from within the recovery mode, then with ES file manager, then with Android Terminal Emulator - NONE worked. I tried deleting the entire folder and then copying the backed up one, I can't delete it (even though I have superuser permissions). For example ES FM gives "error code 39" when trying to delete the folder and it either deletes all files from inside (apart from Lost+Found folder) or only some of the files. Same with AROMA. I checked that /efs is mounted rw... (I'm not even sure if I should try to alter it while it's mounted and the phone is running, but this was one of the ways I read about while searching. When I enter CWM recovery, it does not appear to be mounted and thus is empty.. so I assume whatever I paste in there will get wiped once it's mounted at boot)
Any idea how to restore the folder from the stock firmware or how to get a working mobile network?
Model number: GT-I9000
Android version: 4.2.2
Baseband version: Unknown
Kernel version: 3.0.71-Semaphore_JB_2.9.18s

Try flashing "stepwise", ie.
2.3.6 ->CM9 -> Slim Bean.
This ensures that your IMEI is kept. When you flash CM9, let it boot completely first, then reboot into recovery and flash Slim.
Sent from my GT-P7510 using Tapatalk HD

Soryuu said:
Try flashing "stepwise", ie.
2.3.6 ->CM9 -> Slim Bean.
This ensures that your IMEI is kept. When you flash CM9, let it boot completely first, then reboot into recovery and flash Slim.
Sent from my GT-P7510 using Tapatalk HD
Click to expand...
Click to collapse
Thank you! That indeed worked! One question: when I installed CM9 the firmware changed to XXJVT (and this is now the one shown under baseband version in SlimBean). Is there any major difference between XWJW1 and XXJVT, does it matter at all?

Modems do differ, mostly in terms of region (most modems are localised for certain countries). The differences between XXJVT and XWJW1 I have no idea about.
For most people it doesn't really matter, XXJVT is fine for them. Changing modems is only really something that you do either to save battery (some modems are better at battery than others), change for region (say XXJVT doesn't work too well in your region) or just to test other modems.
Sent from my GT-P7510 using Tapatalk HD

Soryuu said:
Modems do differ, mostly in terms of region (most modems are localised for certain countries). The differences between XXJVT and XWJW1 I have no idea about.
For most people it doesn't really matter, XXJVT is fine for them. Changing modems is only really something that you do either to save battery (some modems are better at battery than others), change for region (say XXJVT doesn't work too well in your region) or just to test other modems.
Sent from my GT-P7510 using Tapatalk HD
Click to expand...
Click to collapse
I see, thanks!

I'm having a similar issue now too. Going from jw6 to cm10.2 and lost my imei. Tried the advice above. jw6 - cm9.1 (imei fine) - cm10.1.2 and get the imei missing message. Maybe I'm gonna just have to stick with cm9. In the end it's just a backup phone for my kids but I want nova on it.

goughymachine said:
I'm having a similar issue now too. Going from jw6 to cm10.2 and lost my imei. Tried the advice above. jw6 - cm9.1 (imei fine) - cm10.1.2 and get the imei missing message. Maybe I'm gonna just have to stick with cm9. In the end it's just a backup phone for my kids but I want nova on it.
Click to expand...
Click to collapse
Hmmm.
Try
JW6 -> CM9 (If your IMEI was fine, then I don't really see why there's a problem...)
Then CM9 -> CM10 or CM10.1.0 (as another intermediate step, to see if your IMEI survives)
If your IMEI is fine, then flash 10.1.2
Odd though, the only time I've had IMEI loss going from CM9 to Jelly Bean was because I didn't let CM9 boot up properly first... So try to flash CM10.1.2 straight from CM9 and see if you run into the same problem again
Sent from my GT-P7510 using Tapatalk HD

[Q] Correct IMEI, but won't connect to Network

Hey guys,
i recently bought an GT-I8190 off eBay. Problem is, it won't connect to any provider's network. It doesn't even find the correct network. It's not a SIM problem, SIM in different phone will find and connect to the right provider.
IMEI is correct though. I flashed cyanogenmod 11 (goldennova) and I8190XXANI4 Baseband. Still not able to connect. I already backed up EFS.
Any suggestions are greatly appreciated!

Hi,
Install by Odin latest stock rom, after restart turn off phone and go to recovery and do factory reset. After this check working connection.
Or here you find solution
http://forum.xda-developers.com/showthread.php?p=45527911
Sent from my GT-I8190 using XDA Free mobile app

eqal said:
Hi,
Install by Odin latest stock rom, after restart turn off phone and go to recovery and do factory reset. After this check working connection.
Or here you find solution
http://forum.xda-developers.com/showthread.php?p=45527911
Sent from my GT-I8190 using XDA Free mobile app
Click to expand...
Click to collapse
Thanks for your help. But i think you got me wrong, the problem existed even before i flashed cm. I don't think it has anything to do with cm.
I am on Linux, so i used Heimdall to flash latest Stock ROM. Did a factory reset, from within android and another one from recovery. Didn't help. At least the right provider is shown now, but i still can't connect. Now i am back to where i started, before i flashed cm.
Do you think it would help, if i flash modemFS?
I also checked if my IMEI is stolen here: http://www.amta.org.au/pages/amta/Check.the.Status.of.your.Handset
but I'm in germany, i don't know if their IMEI check is valid for me.
I also tried to repartition during flash, to wipe out all corrupted remainings, but heimdall fails to initialise protocol if i try to repartition. I downloaded my phone's .pit file and used that one.
Thanks in advance!

Still no success.
I tried different ROMs, Stock and Custom, even with repartitioning enabled.
I don't know what to do... must be a problem in one of the files/partitions that aren't touch by a full flash with repart, right?
Please help

Halp

Moootze said:
Halp
Click to expand...
Click to collapse
are you sure is it software or rom problem? maybe its Hardware problem and you should check it in a shop or something? maybe just something inside phone broken during carrier or something.

I'm in the same boat. Have a Swiss factory unlocked phone that I was given by a friend. I decided to flash it to CM11.
I tried initially to do it via the stock recovery but when that failed to due a lack of root I did it via Android Toolkit 1.3.4 which I found through the forum. It loaded the TWRP 2.6.3 recovery and then completed the flash of novafusion CM11 no which I had had already on SD card all by itself pretty much. Before first boot I went in and flashed google apps mini and the "original logo" file that novafusion had under extras.
Upon first boot, there was no cell signal and I've been trying ever since to fix it.
Tried flashing modemfs.zip
Tried flashing versions of stock roms via odin.
Tried the latest I8190N stock rom.
Tried repartitioning via .pit method in odin.
Tried various basebands.
Tried basebands + modemfs
Tried flashing the param/logo file
I'm basically out of ideas...