[GUIDE] How to fix "unknown baseband" / "stuck on airplane mode" problem
Today my friend who has a i9100 as I presented the unit with the following problem: not connected in any way in the mobile carrier, airplane mode was stucked.
Well, looking on the internet and especially this forum, I found several solutions to make the flash the original rom to accept that his incredible Samsung Galaxy SII had become an amazing Samsung Play SII. As I'm Brazilian and never give up, here's what worked for me.
---------
Most importantly, use at your own risk. If you are unsure of the steps below, do not do or have someone who has more experience. The procedures worked for me, but does not mean it will work for you.
Special care was always doing this kind of operation in any type of phone: use good quality cables, make sure that there is no bad contacts and preferably make the flash operations with a notebook with the battery at 100% load and phone with 100% load. After all, nobody wants the operation is interrupted and you get a plastic brick.
----
Here are the steps:
1) Download this application: http://forum.xda-developers.com/showthread.php?t=1308546. EFS Pro serves to backup / restore partition EFS.
2) To use EFS Pro, your phone must be enabled with the root. To do this, follow:
2.a) Paving the way for SuperOneClick: http://forum.xda-developers.com/showthread.php?t=1056334
2.b) Using SuperOneClick to "open legs": http://forum.xda-developers.com/showthread.php?t=803682
2.c) Now, some screwdrivers and screws inside your device: https://market.android.com/details?...t=W251bGwsMSwxLDEsInN0ZXJpY3Nvbi5idXN5Ym94Il0.
3) Now the easy part, get another Galaxy S2 to be the "donor" baseband. You do not? Download mine by this link:
https://hotfile.com/dl/149885347/a004c04/EFS_20111227_235358.tar.html or https://rapidshare.com/files/2401446638/EFS_20111227_235358.tar. If you use my baseband, skip to step 3.b.
3.a) Pick up the phone "donor", run the EFS Pro and select the backup option. To accelerate the process, ask to put the backup on the sdcard. There, he set up and placed in the / sdcard / EFSProBackup.
3.b) Copy / Create the folder / sdcard / EFSProBackup problem to the phone with the same path.
3.c) EFS Pro back in, ask to restore the backup from the device (will find the file you copied) and ready.
4) Give the problem phone a boot and see the problem disappear.
----
This is my first post and hopefully it will be useful. Pay me a beer if you like it.
Hi, ljlima,
thanks for your report, I'am Brazilian too, but I'm almost giving up
Completely disappointed with this ****ty problem... Made a hard reset typing a code in phone keypad (since I could not access ID samsung in factory reset) and nothing...
Very afraid of following your instructions since I'am totally newbie and there is no replies confirming your method.
Is there a chance of solving this by upgrading android version (although KIES is crappy as hell) or other non invasive and easier method ?
thank you!
Samsung Galaxy SII
2.3.3
kernel version
2.6.35.7-I9100XWKE2-CL187606 [email protected] #2
GINGERBREAD.XWKE2
ljlima said:
4) Give the problem phone a boot and see the problem disappear.
Click to expand...
Click to collapse
But the IMEI will be 0049...
THANK YOU THANK YOU THANK YOU!
SAVED MY GALAXY SII from Bell
Also, sometimes, if your /EFS is not totally corrupted, you can just reflash your modem. I had issues with this on CM7 nightlies, and my problem was always solved with a simple reflash. Its easier than restoring your whole /EFS backup, and a lot quicker. But, mind this is only if your /EFS isn't done for.
Thnx a lot. for refreshind download links.
any one confirm the success of this method?
Confirmed Solution
This worked for me!!! You can find this software on net. Search with GSII_Repair. This works for sure!!! This can be downloaded from Google Play Market also. Available for free!!!
ghassir said:
Thnx a lot. for refreshind download links.
any one confirm the success of this method?
Click to expand...
Click to collapse
"lambergino" user tryed on january and works. And I wrote this post after resolve my friend problem.
"Unknown" baseband on a non-rooted SGS2!
Help!
My SGS2 suddenly would not recognize any SIM after a failed attempt at backing up my files using the sh!tty Kies software.
All I did was make a backup using Kies and somehow it got stuck "Preparing". I left it overnight and in the morning, when I checked, it still didn't go through the backup process - just kept saying preparing. Anyway, I decided to cancel it as I needed to use my phone already. I clicked on the cancel button and guess what? It also got stuck in cancelling! I left it and went to shower and when I got back after about 15 minutes (probably longer), it still didn't cancel. Frustrated, I plugged the USB cable out. Later that day, I noticed that I didn't receive any SMS/call. Then, I noticed that the notification bar displayed the "no signal" icon. I rebooted my phone, hoping the signal would return. But, I still got no signal after it switched on.
I did a factory reset, hoping it will put everything back to normal. I used the volume+power key combination as the factory reset option under Settings, somehow, would not work. Anyway, after doing the factory reset, it still wouldn't connect to the network.
I then noticed that the About screen displayed an "Unknown" baseband version.
From what I read from this thread and several other forums, this could be due to a corrupted /efs partition, which could have resulted from improperly rooting/flashing the device. However, I never rooted my phone in the first place!!!
And I heard the ICS update is rolling out now but I can't update because, somehow, Kies won't connect to my phone anymore!!!
My phone now is practically a very expensive music player. THIS IS SO FRUSTRATING!!!
Please help, anyone!
Hi there
I have a I9100G with missing IMEI and Baseband. Can I use your I9100 EFS file on my I9100G ?
Or is there someone who can provide EFS files for I9100G?
Thanks in advance!!!
Regards
Please try one these solutions
ljlima said:
Today my friend who has a i9100 as I presented the unit with the following problem: not connected in any way in the mobile carrier, airplane mode was stucked.
Well, looking on the internet and especially this forum, I found several solutions to make the flash the original rom to accept that his incredible Samsung Galaxy SII had become an amazing Samsung Play SII. As I'm Brazilian and never give up, here's what worked for me.
---------
Most importantly, use at your own risk. If you are unsure of the steps below, do not do or have someone who has more experience. The procedures worked for me, but does not mean it will work for you.
Special care was always doing this kind of operation in any type of phone: use good quality cables, make sure that there is no bad contacts and preferably make the flash operations with a notebook with the battery at 100% load and phone with 100% load. After all, nobody wants the operation is interrupted and you get a plastic brick.
----
Here are the steps:
1) Download this application: http://forum.xda-developers.com/showthread.php?t=1308546. EFS Pro serves to backup / restore partition EFS.
2) To use EFS Pro, your phone must be enabled with the root. To do this, follow:
2.a) Paving the way for SuperOneClick: http://forum.xda-developers.com/showthread.php?t=1056334
2.b) Using SuperOneClick to "open legs": http://forum.xda-developers.com/showthread.php?t=803682
2.c) Now, some screwdrivers and screws inside your device: https://market.android.com/details?...t=W251bGwsMSwxLDEsInN0ZXJpY3Nvbi5idXN5Ym94Il0.
3) Now the easy part, get another Galaxy S2 to be the "donor" baseband. You do not? Download mine by this link:
https://hotfile.com/dl/149885347/a004c04/EFS_20111227_235358.tar.html or https://rapidshare.com/files/2401446638/EFS_20111227_235358.tar. If you use my baseband, skip to step 3.b.
3.a) Pick up the phone "donor", run the EFS Pro and select the backup option. To accelerate the process, ask to put the backup on the sdcard. There, he set up and placed in the / sdcard / EFSProBackup.
3.b) Copy / Create the folder / sdcard / EFSProBackup problem to the phone with the same path.
3.c) EFS Pro back in, ask to restore the backup from the device (will find the file you copied) and ready.
4) Give the problem phone a boot and see the problem disappear.
----
This is my first post and hopefully it will be useful. Pay me a beer if you like it.
Click to expand...
Click to collapse
Braidonh said:
Also, sometimes, if your /EFS is not totally corrupted, you can just reflash your modem. I had issues with this on CM7 nightlies, and my problem was always solved with a simple reflash. Its easier than restoring your whole /EFS backup, and a lot quicker. But, mind this is only if your /EFS isn't done for.
Click to expand...
Click to collapse
scorypto said:
This worked for me!!! You can find this software on net. Search with GSII_Repair. This works for sure!!! This can be downloaded from Google Play Market also. Available for free!!!
Click to expand...
Click to collapse
You need to try one of these.
None of this works for me, I tried everything
Any other advice
Regards
Service centre or JTag repair .
jje
gordskin
ljlima said:
Today my friend who has a i9100 as I presented the unit with the following problem: not connected in any way in the mobile carrier, airplane mode was stucked.
Well, looking on the internet and especially this forum, I found several solutions to make the flash the original rom to accept that his incredible Samsung Galaxy SII had become an amazing Samsung Play SII. As I'm Brazilian and never give up, here's what worked for me.
---------
Most importantly, use at your own risk. If you are unsure of the steps below, do not do or have someone who has more experience. The procedures worked for me, but does not mean it will work for you.
Special care was always doing this kind of operation in any type of phone: use good quality cables, make sure that there is no bad contacts and preferably make the flash operations with a notebook with the battery at 100% load and phone with 100% load. After all, nobody wants the operation is interrupted and you get a plastic brick.
----
Here are the steps:
1) Download this application: http://forum.xda-developers.com/showthread.php?t=1308546. EFS Pro serves to backup / restore partition EFS.
2) To use EFS Pro, your phone must be enabled with the root. To do this, follow:
2.a) Paving the way for SuperOneClick: http://forum.xda-developers.com/showthread.php?t=1056334
2.b) Using SuperOneClick to "open legs": http://forum.xda-developers.com/showthread.php?t=803682
2.c) Now, some screwdrivers and screws inside your device: https://market.android.com/details?...t=W251bGwsMSwxLDEsInN0ZXJpY3Nvbi5idXN5Ym94Il0.
3) Now the easy part, get another Galaxy S2 to be the "donor" baseband. You do not? Download mine by this link:
https://hotfile.com/dl/149885347/a004c04/EFS_20111227_235358.tar.html or https://rapidshare.com/files/2401446638/EFS_20111227_235358.tar. If you use my baseband, skip to step 3.b.
3.a) Pick up the phone "donor", run the EFS Pro and select the backup option. To accelerate the process, ask to put the backup on the sdcard. There, he set up and placed in the / sdcard / EFSProBackup.
3.b) Copy / Create the folder / sdcard / EFSProBackup problem to the phone with the same path.
3.c) EFS Pro back in, ask to restore the backup from the device (will find the file you copied) and ready.
4) Give the problem phone a boot and see the problem disappear.
----
This is my first post and hopefully it will be useful. Pay me a beer if you like it.
Click to expand...
Click to collapse
YOu are lifesaver, it actually worked after I have tried 100's of difernet thinks. Thanks:good:
need your help
gordskin said:
YOu are lifesaver, it actually worked after I have tried 100's of difernet thinks. Thanks:good:
Click to expand...
Click to collapse
please can you share wich way helped you !!!
Your Fix
ljlima said:
Today my friend who has a i9100 as I presented the unit with the following problem: not connected in any way in the mobile carrier, airplane mode was stucked.
Well, looking on the internet and especially this forum, I found several solutions to make the flash the original rom to accept that his incredible Samsung Galaxy SII had become an amazing Samsung Play SII. As I'm Brazilian and never give up, here's what worked for me.
---------
Most importantly, use at your own risk. If you are unsure of the steps below, do not do or have someone who has more experience. The procedures worked for me, but does not mean it will work for you.
Special care was always doing this kind of operation in any type of phone: use good quality cables, make sure that there is no bad contacts and preferably make the flash operations with a notebook with the battery at 100% load and phone with 100% load. After all, nobody wants the operation is interrupted and you get a plastic brick.
----
Here are the steps:
1) Download this application: http://forum.xda-developers.com/showthread.php?t=1308546. EFS Pro serves to backup / restore partition EFS.
2) To use EFS Pro, your phone must be enabled with the root. To do this, follow:
2.a) Paving the way for SuperOneClick: http://forum.xda-developers.com/showthread.php?t=1056334
2.b) Using SuperOneClick to "open legs": http://forum.xda-developers.com/showthread.php?t=803682
2.c) Now, some screwdrivers and screws inside your device: https://market.android.com/details?...t=W251bGwsMSwxLDEsInN0ZXJpY3Nvbi5idXN5Ym94Il0.
3) Now the easy part, get another Galaxy S2 to be the "donor" baseband. You do not? Download mine by this link:
https://hotfile.com/dl/149885347/a004c04/EFS_20111227_235358.tar.html or https://rapidshare.com/files/2401446638/EFS_20111227_235358.tar. If you use my baseband, skip to step 3.b.
3.a) Pick up the phone "donor", run the EFS Pro and select the backup option. To accelerate the process, ask to put the backup on the sdcard. There, he set up and placed in the / sdcard / EFSProBackup.
3.b) Copy / Create the folder / sdcard / EFSProBackup problem to the phone with the same path.
3.c) EFS Pro back in, ask to restore the backup from the device (will find the file you copied) and ready.
4) Give the problem phone a boot and see the problem disappear.
----
This is my first post and hopefully it will be useful. Pay me a beer if you like it.
Click to expand...
Click to collapse
Will this work in Germany? I have the same problem. Can I use your baseband since I dont have a donor Handy SII? I have been racking my brain for 3 days trying to correct this.
ScottsDesk said:
Will this work in Germany? I have the same problem. Can I use your baseband since I dont have a donor Handy SII? I have been racking my brain for 3 days trying to correct this.
Click to expand...
Click to collapse
As I said, try it on own risk. But I think that will work because other international users tried and worked, as you can see in this thread.
Good luck.
Donor EFS backup file needed..
Hi, I need a donor file compatible with EFSPro the links given in OP post have a .tar file whereas the latest version of EFS Pro works with a tar.gz with .img file in it.
I have also tried to replace the nv_data.bin file with the .bak version but the folder is Read only and I cannot over write the original file.
Any help is appreciated.
3) Now the easy part, get another Galaxy S2 to be the "donor" baseband. You do not? Download mine by this link:
https://hotfile.com/dl/149885347/a004c04/EFS_20111227_235358.tar.html or https://rapidshare.com/files/2401446638/EFS_20111227_235358.tar. If you use my baseband, skip to step 3.b.
3.a) Pick up the phone "donor", run the EFS Pro and select the backup option. To accelerate the process, ask to put the backup on the sdcard. There, he set up and placed in the / sdcard / EFSProBackup.
3.b) Copy / Create the folder / sdcard / EFSProBackup problem to the phone with the same path.
3.c) EFS Pro back in, ask to restore the backup from the device (will find the file you copied) and ready.
4) Give the problem phone a boot and see the problem disappear.
----
This is my first post and hopefully it will be useful. Pay me a beer if you like it.[/QUOTE]
ljlima said:
Today my friend who has a i9100 as I presented the unit with the following problem: not connected in any way in the mobile carrier, airplane mode was stucked.
Well, looking on the internet and especially this forum, I found several solutions to make the flash the original rom to accept that his incredible Samsung Galaxy SII had become an amazing Samsung Play SII. As I'm Brazilian and never give up, here's what worked for me.
---------
Most importantly, use at your own risk. If you are unsure of the steps below, do not do or have someone who has more experience. The procedures worked for me, but does not mean it will work for you.
Special care was always doing this kind of operation in any type of phone: use good quality cables, make sure that there is no bad contacts and preferably make the flash operations with a notebook with the battery at 100% load and phone with 100% load. After all, nobody wants the operation is interrupted and you get a plastic brick.
----
Here are the steps:
1) Download this application: http://forum.xda-developers.com/showthread.php?t=1308546. EFS Pro serves to backup / restore partition EFS.
2) To use EFS Pro, your phone must be enabled with the root. To do this, follow:
2.a) Paving the way for SuperOneClick: http://forum.xda-developers.com/showthread.php?t=1056334
2.b) Using SuperOneClick to "open legs": http://forum.xda-developers.com/showthread.php?t=803682
2.c) Now, some screwdrivers and screws inside your device: https://market.android.com/details?...t=W251bGwsMSwxLDEsInN0ZXJpY3Nvbi5idXN5Ym94Il0.
3) Now the easy part, get another Galaxy S2 to be the "donor" baseband. You do not? Download mine by this link:
https://hotfile.com/dl/149885347/a004c04/EFS_20111227_235358.tar.html or https://rapidshare.com/files/2401446638/EFS_20111227_235358.tar. If you use my baseband, skip to step 3.b.
3.a) Pick up the phone "donor", run the EFS Pro and select the backup option. To accelerate the process, ask to put the backup on the sdcard. There, he set up and placed in the / sdcard / EFSProBackup.
3.b) Copy / Create the folder / sdcard / EFSProBackup problem to the phone with the same path.
3.c) EFS Pro back in, ask to restore the backup from the device (will find the file you copied) and ready.
4) Give the problem phone a boot and see the problem disappear.
----
This is my first post and hopefully it will be useful. Pay me a beer if you like it.
Click to expand...
Click to collapse
dud id used your EFS...i did not work for me...i then factory reset my phone.,..now there is an input password when opening the phone! now i totally cant acces my phone because of this password...pin code...
SIM Pin or Network Code?
Either way your IMEI must be back.
Sent from the little guy
Hello all SGS3 users.
I have a strong issue on my branded Samsung I9300. When I browse the /efs folder (with Root Explorer for example), I notice a strange thing.
Two files are changed every hour (the date and the time). Revelant files are : nv_data.bin & nv_data.bin.md5
I know it's important files (including IMEI number and other important information). I have already make backup.
I said that my phone work properly with the right IMEI number, but I'm afraid to turn off my phone not to stop writing files.
Have you ever heard of this ?
Note : I use I9300XXBLG8/I9300OXABLG8 PDA/CSC. I have try to unlock my phone with Voodoo unlocker (thanks supercurio) with previous firmware. When I upgrade my phone to LG8 (and loose my unsimlock), I haven't try to fix Voodoo issue. I have the same network provider as the phone.
Note 2 : I'm sorry for my bad skill in english
just check on mine and it seems to do the same thing
It should come from the new samsung "feature" that make voodoo unlock useless for now
Do not be worry: I have turned my phone off a few times since I flashed LG8 without issue
Thank you for your reply.
If I can restard my phone without issue, it's a good news.
Can you just watch what happens in "nv.log". In my case, no record about it.
same thing: not listed in nv.log
I have upgrade my modem OTA (with the LH1 available today).
It does change this issue.
Others are in this situation ? (I think of guys who don't have try unlock their phones with software hacks)
lelinuxien52 said:
Hello all SGS3 users.
I have a strong issue on my branded Samsung I9300. When I browse the /efs folder (with Root Explorer for example), I notice a strange thing.
Two files are changed every hour (the date and the time). Revelant files are : nv_data.bin & nv_data.bin.md5
I know it's important files (including IMEI number and other important information). I have already make backup.
I said that my phone work properly with the right IMEI number, but I'm afraid to turn off my phone not to stop writing files.
Have you ever heard of this ?
Note : I use I9300XXBLG8/I9300OXABLG8 PDA/CSC. I have try to unlock my phone with Voodoo unlocker (thanks supercurio) with previous firmware. When I upgrade my phone to LG8 (and loose my unsimlock), I haven't try to fix Voodoo issue. I have the same network provider as the phone.
Note 2 : I'm sorry for my bad skill in english
Click to expand...
Click to collapse
As you have already stated in your post EFS folder contains important information such as IMEI number, Phone number and other details...the nv_data.bin file changes it size as the time passes... it is a known behaviour and is not a bug..backup your efs partition on to external medium and restore when required...
read this post.
http://forum.xda-developers.com/showthread.php?t=1314719
zoot1 said:
As you have already stated in your post EFS folder contains important information such as IMEI number, Phone number and other details...the nv_data.bin file changes it size as the time passes... it is a known behaviour and is not a bug..backup your efs partition on to external medium and restore when required...
read this post.
http://forum.xda-developers.com/showthread.php?t=1314719
Click to expand...
Click to collapse
Thanks for your answer. I have already make backup with Toolkit v4.0 and EFS Pro 1.8.
I understand that this may be considered duplicate. However due to the title of the previous thread clearly stating that the effort there is closed, I though I open this up. I would really love to get more 4g bands working as I have no LTE service in my area. Here is a post from the aforementioned thread.
-------
Maybe Possible Solution
Just found this thread after I unlock carrier locked my Hisense B16C2G phone that can't be unlocked for almost 3 years. This is just hypothesis, I suggest to try this with concern.
There are several file that determine bands capability in the devices. Most of it is in NV partition, but from the discussion I know that you guys have tried some popular ways to unlock it, but it failed. Like my phone at first i believe its hardware locked too, but i just discovered some Chinese article about unlocking oneplus device. Maybe you can try it too.
Here it is:
1. Connect to QPST and open EFS explorer
2. In policyman folder there are 3 file that most likely can be the cause of this network restiction
carrier_policy.xml
post.xml (in my phone there is none)
rat_mask (in my case this file that restrict my network even after I change NV values to support all bands)
3. Compare all three file with other phone's that most likely have same architechture (maybe MI8 or Pixel). For rat_mask, make sure it have same bits number(compare with Hex Editor)
4. replace that carrrier_policy.xml(and any file that contain this name) and rat_mask with modified files or use you can use other unrestricted phone's instead
These file originally in modem.img. Some phone replace them back with the original file when boot, you can modified init.radio.sh to prevent that.
We can modify carrier_policy.xml in modem.img and flash it to the phone but i cant find where rat_mask located
5. Reboot and hope if it solve your problem
I can't find any reference about how to generate unrestricted rat_mask and device_config so make sure you backup your original file before you make modification. Sorry I can confirm whether it will work or not because i don't own poco
NB: I solve my problem just with replacing carrier_config.xml and rat_mask. There is a file called device_config, be careful with this file because it control how the phone modem interact with qpst too, wrong modification can cause you cant connect to PC even in diag mode.
https://forum.xda-developers.com/poco-f1/help/poco-f1-lte-bands-unlock-t3835467/page22
-------
Does the above information help at all with this effort? I'm not quite savvy enough to pursue this on my own. I also found the below thread which describes a process which is apparently still working for many Qualcomm devices including Xiaomi. Has this method been attempted with the Poco F1?
http://in.c.mi.com/thread-527028-10-1.html
I sold my Poco and took over my GF's which was on 10.2.3. I had LTE at my place, confirmed with speed test and LTE app. After upgrading to 10.3.4 today I no longer have LTE. I've tried switching back and forth between APNs to no avail. Any ideas?
Any updates, did you got it working? I need to unlock B5 and 28.