Database Develop

[Q] Baseband version unknown, no IMEI, doesn't recognize SIM

So basically I have a phone (not mine) that says Baseband version: unknown, no IMEI when dialing *#06# and doesn't recognize SIM card at all.
Apparently the phone is running stock KK9 2.3.6. AFAIK it has not been rooted or had custom ROM's installed.
The owner said it recently started dropping from network, and usually didn't reconnect at all. This would indicate a broken baseband chip, since now it doesn't even recognize the card?
Any suggestions what to try?

jusutus said:
So basically I have a phone (not mine) that says Baseband version: unknown, no IMEI when dialing *#06# and doesn't recognize SIM card at all.
Apparently the phone is running stock KK9 2.3.6. AFAIK it has not been rooted or had custom ROM's installed.
The owner said it recently started dropping from network, and usually didn't reconnect at all. This would indicate a broken baseband chip, since now it doesn't even recognize the card?
Any suggestions what to try?
Click to expand...
Click to collapse
Try Flashing Stock ROM, Follow link for instructions.
http://forum.xda-developers.com/showthread.php?t=1424997

Thanks for the quick reply. Unfortunately flashing did not help.

EFS corrupted? Any backup done?

No backup done.

you might wanna try this see if it helps... http://forum.xda-developers.com/showthread.php?t=1264021

Apparently there is a backup of the original EFS file - is it possible to just restore it?

do u meant the original files under /efs/? If that's what you meant, try to follow the steps in the previous SGS2 link. Else if it's an external EFS backup image, then there should be no problem restoring it ie. with EFSProBackup. good luck...

Now it's getting even stranger;
the phone works fine when the battery is removed for about half an hour and SIM card installed after that. I left the phone on my desk without the battery for the night, and now it works just fine. But I know that when I reboot it, it loses the baseband once again.

You mentioned you've flashed a stock rom before, which method did you use, pc odin or cwm/mobile odin? did u do a full wipe?
After restoring ur EFS, do a nand backup if you need to then wipe data/dalvik/cache from recovery mode and reflash via pc odin with a stock rom in ur region...

It look like to me you are having hardware problem. Send it back for replace or repairing..
Sent from my GT-N7000 using XDA App

[Q] Help needed, stuck after updating firmware (emergency call)

Hi,
Well my device which is S5 mini g800f working fine, since I have changed the firmware which was old like build on july so I tried to installed latest, but now there is emergency call showing, also I have tried manually and automatically to register on the network but it says unable to register to the (---network). I did it coz my device was not showing LTE network. However my sim supports the 4g and was working on S4 i9505. I have searched on Google and look out many threads on XDA but no success until now.
The biggest mistake was I didn't looked the firmware which was already there and was running with 3g support. I have tried these EUR-G800FXXU1ANL1-20141226162921, SER-G800FXXU1ANG1-20140709112536, MAT-G800FXXU1ANI3-20141218172328. Then I have installed Custom Lollipop but no success was there too.
So now any pro's here who can understand my problem ? My imei is showing, is there any procedure where I can put the imei and it will let me know what was installed on stock :crying:
Sorry for being noobish..

Please any buddy give me suggestions that what should I do ? Or should I look in the specific section of XDA forums ?

[email protected] said:
Hi,.....
So now any pro's here who can understand my problem ? My imei is showing, is there any procedure where I can put the imei and it will let me know what was installed on stock :crying:
Sorry for being noobish..
Click to expand...
Click to collapse
What do you mean by this? IMEI showing or Not?

02xda2 said:
What do you mean by this? IMEI showing or Not?
Click to expand...
Click to collapse
Its is mentioned mate what I have written, I said my imei is showing that by dialing *#06# I can see it, because there is a problem where the efs folder corrupted or gone you cant see imei or imei appears to be in these digits 00000 especially by installing custom roms. Anyways my only motive is that I know the imei and how ever I can see it too, so is there any procedure where I can put the imei to the website and see what was installed on stock. Because I dont have the box so I dont know which firmware was there when I installed another rom to get LTE, because it was working properly as I said in my earlier post.
Problem is due the baseband I am pretty sure which is not matching, this is the reason because I cant connect to the network---error msg (Unable to connect).

[email protected] said:
Hi,
Well my device which is S5 mini g800f working fine, since I have changed the firmware which was old like build on july so I tried to installed latest, but now there is emergency call showing, also I have tried manually and automatically to register on the network but it says unable to register to the (---network). I did it coz my device was not showing LTE network. However my sim supports the 4g and was working on S4 i9505. I have searched on Google and look out many threads on XDA but no success until now.
The biggest mistake was I didn't looked the firmware which was already there and was running with 3g support. I have tried these EUR-G800FXXU1ANL1-20141226162921, SER-G800FXXU1ANG1-20140709112536, MAT-G800FXXU1ANI3-20141218172328. Then I have installed Custom Lollipop but no success was there too.
So now any pro's here who can understand my problem ? My imei is showing, is there any procedure where I can put the imei and it will let me know what was installed on stock :crying:
Sorry for being noobish..
Click to expand...
Click to collapse
The baseband firmware is included in the firmware packages that are available on sammobile (.tar.md5 files). If you flash the firmware package with Odin, also the baseband firmware (contained in modem.bin) will be flashed.
If you have problems with a newly flashed stock firmware that were not present with the original firmware it might be because of one of the following reasons:
You flashed the wrong firmware. I don't think that the version name of the original firmware is stored somewhere. Instead check sammobile for the correct one: select the correct phone model and your country. EUR, SER (for Russia), MAT are country codes, choose the correct one for your country, the search function on sammobile will help you with that. You can also try Kies for restoring the firmware. Maybe that is able to determine the correct firmware according to the IMEI or some other information stored on the phone.
Maybe your EFS partition was changed and corrupted. The EFS partition is the partition that contains the IMEI and other information like calibration files that are specific for your device. If any of the files in this partition is damaged, the phone might not behave correctly. If you flash another firmware the EFS partition normally is not changed.
Your hardware is defect.
I guess that you simply flashed the wrong ROM. Otherwise the problem will be hard to fix.

[email protected] said:
...... where I can put the imei to the website and see what was installed on stock. ..........
Click to expand...
Click to collapse
Probably THIS is what you want, hope so

02xda2 said:
Probably THIS is what you want, hope so
Click to expand...
Click to collapse
Thanks but for me its not working... its showing device Nokia 6303i

HELP: Upgraded from stock 4.2.2 to 4.4 and lost network connectivity

Hello All,
Tried searching for a case peculiar as mine, wasnt able to find one so here is the lowdown.
1. Xperia C6603 , originally had 4.2.2 stock ROM which was working fine with my local network. Dont remember the baseband version.
2. Used XperiFirm to download the latest firmware as reported in the list. Dont know what does the suffix RxD (R1D--R8D) means. Anyone please explain. As per the below screenshot downloaded version "C6603_Customized HK_1270-5695_10.5.1.A.0.292_R1D" .
3. Before flashing the downloaded firmware I flashed the dualrecovery from XZDualRecovery. I made a TWRP backup of the 4.2.2 stock ROM on an external SD card, for all partitions including TA,system,boot etc.
4. Used Flashtool to convert the downloaded (step 2) firmware "FILES" format to a flashable FTF file. Flashed the firmware , which went on smoothly.
5. At the first startup I got the following screen , telling me that it is a prototype device/firmware . I went on to see that the network which was working fine with stock ROM 4.2.2 was no longer available.
I tried to go to settings to check and search for networks, which shows available networks, but unable to get itself registered to the SIM providers network. Tried all the settings combinations in menu "*#*#4636*#*#" , nothing makes it work to get the GSM network connectivity back. It is supposedly on the correct setting of LTE/WCDMA/GSM which my current operator supports. Following is the "About" screen for current baseband version.
Tried going in the "Service" menu via "*#*#7378423#*#*" , with the following info, having an unknown modem configuration.
6. Tried reverting back to the old TWRP backup, for which I needed the TWRP recovery loaded on the phone. So ran the XZDualRecovery script again (with the new 4.4 ROM on the phone), however the script hangs around in the end and never reboots the phone with the TWRP recovery. So i am unable to revert and use the stock ROM backups .
7. I dont want to root/unlock the bootloader, however I tried installing TWRP via its "XZrecovery.apk", but it requires busybox (which requires a rooted phone). So i tried the rooting script from [GUIDE] How to root 10.5.1.A.0.283 / 10.5.1.A.0.292 [Locked Bootloader], but it also hangs around in the end and never delivers a rooted phone.
8. Tried looking around for assortment of xperia Z baseband files to check and see if flashing it separately can make it work, however to no avail the the condition persists.
Either ways having a prototype version on the phone which transmits all data back to sony is not desirable at all. So need to replace it for sure. Currently I am stuck in the middle without a clue of how to go back and restore the 4.2.2 TWRP backup, or to actually flash a "non-prototype" or retail version of 4.4.x .
Any help/guidance/suggestions to remedy would be appreciated.
Thanks.
=====================UPDATE
Ok followed the instructions at [GUIDE] How to root 10.5.1.A.0.283 / 10.5.1.A.0.292 [Locked Bootloader] , read carefully again to flash the .230 kernel. Flashed the XZDualRecovery and got the TWRP recovery back.
Restored the old 4.2.2 TWRP backup , hoping that everything would go back to normal. However with a successul restore and a reboot, I was amazed to see I still have no network connectivity. The baseband version is "9x15A-ACEFWMAZQ-30110068-44" . Another noticeable thing was that after the restore and first boot, I still got the "prototype device" message again, which was not there when I first booted the device with original stock 4.2.2 ROM before this flashing adventure began.
Any ideas what may have gone bad.
Thanks.
=======================================
Just got to know that my device is a BROWN device, its IMEI number starts from 0044 so it is a prototype. Any ideas is it really good or bad to have one. Also I see that after another restore of the original stock 4.2.2 ROM it is barely getting the signals indoor (1 bar only). The signal reception is very weak and sporadic . Should i keep the device or not and is there any remedy or network signal strength.
Thanks.

HyperEscape said:
Hello All,
Tried searching for a case peculiar as mine, wasnt able to find one so here is the lowdown.
1. Xperia C6603 , originally had 4.2.2 stock ROM which was working fine with my local network. Dont remember the baseband version.
2. Used XperiFirm to download the latest firmware as reported in the list. Dont know what does the suffix RxD (R1D--R8D) means. Anyone please explain. As per the below screenshot downloaded version "C6603_Customized HK_1270-5695_10.5.1.A.0.292_R1D" .
3. Before flashing the downloaded firmware I flashed the dualrecovery from XZDualRecovery. I made a TWRP backup of the 4.2.2 stock ROM on an external SD card, for all partitions including TA,system,boot etc.
4. Used Flashtool to convert the downloaded (step 2) firmware "FILES" format to a flashable FTF file. Flashed the firmware , which went on smoothly.
5. At the first startup I got the following screen , telling me that it is a prototype device/firmware . I went on to see that the network which was working fine with stock ROM 4.2.2 was no longer available.
I tried to go to settings to check and search for networks, which shows available networks, but unable to get itself registered to the SIM providers network. Tried all the settings combinations in menu "*#*#4636*#*#" , nothing makes it work to get the GSM network connectivity back. It is supposedly on the correct setting of LTE/WCDMA/GSM which my current operator supports. Following is the "About" screen for current baseband version.
Tried going in the "Service" menu via "*#*#7378423#*#*" , with the following info, having an unknown modem configuration.
6. Tried reverting back to the old TWRP backup, for which I needed the TWRP recovery loaded on the phone. So ran the XZDualRecovery script again (with the new 4.4 ROM on the phone), however the script hangs around in the end and never reboots the phone with the TWRP recovery. So i am unable to revert and use the stock ROM backups .
7. I dont want to root/unlock the bootloader, however I tried installing TWRP via its "XZrecovery.apk", but it requires busybox (which requires a rooted phone). So i tried the rooting script from [GUIDE] How to root 10.5.1.A.0.283 / 10.5.1.A.0.292 [Locked Bootloader], but it also hangs around in the end and never delivers a rooted phone.
8. Tried looking around for assortment of xperia Z baseband files to check and see if flashing it separately can make it work, however to no avail the the condition persists.
Either ways having a prototype version on the phone which transmits all data back to sony is not desirable at all. So need to replace it for sure. Currently I am stuck in the middle without a clue of how to go back and restore the 4.2.2 TWRP backup, or to actually flash a "non-prototype" or retail version of 4.4.x .
Any help/guidance/suggestions to remedy would be appreciated.
Thanks.
=====================UPDATE
Ok followed the instructions at [GUIDE] How to root 10.5.1.A.0.283 / 10.5.1.A.0.292 [Locked Bootloader] , read carefully again to flash the .230 kernel. Flashed the XZDualRecovery and got the TWRP recovery back.
Restored the old 4.2.2 TWRP backup , hoping that everything would go back to normal. However with a successul restore and a reboot, I was amazed to see I still have no network connectivity. The baseband version is "9x15A-ACEFWMAZQ-30110068-44" . Another noticeable thing was that after the restore and first boot, I still got the "prototype device" message again, which was not there when I first booted the device with original stock 4.2.2 ROM before this flashing adventure began.
Any ideas what may have gone bad.
Thanks.
=======================================
Just got to know that my device is a BROWN device, its IMEI number starts from 0044 so it is a prototype. Any ideas is it really good or bad to have one. Also I see that after another restore of the original stock 4.2.2 ROM it is barely getting the signals indoor (1 bar only). The signal reception is very weak and sporadic . Should i keep the device or not and is there any remedy or network signal strength.
Thanks.
Click to expand...
Click to collapse
Firstly I love the detail you have provided which would save you and me a lot of time to pinpoint the exact problem and work it accordingly.
Firstly, I would suggest that if you have a box or any other receipt that shows your exact device name with its basebands. Where did you buy it from and what is your exact location so we can guess your region. This is the time to show it now. Also which basebands work in your location can also help us out.
The problem you have made it flashed basebands of a different variant which has resulted in loss of network. So to fix it we need, and there are three ways about it.
First, download Sony PC companion and try to repair your phone and see if that helps.
Secondly, download flashtool and ftf for your device (make sure you select the right variant this time. Choosing for wrong device can hard brick your phone. so beware) and flash your phone with it.
If all this fails, you go to Sony flashtool called Emma. Download it and try to flash it with that.
You can google how to use every tool on xda and I am sure you would find a lot of guides for that.
Quote me back in case you expect an answer

No SIM / No WIFI: qcn/xqcn files needed to restore IMEI/MAC

Hello All,
November update... It took a whole time to get my phone booting again but I don't have SIM or WIFI anymore.
I think my IMEI's are gone, even as MAC for WIFI.
I tried recovery image (that's what solved the boot problem).
I took backups but some parts seems to be corrupted so I can't recover from there.
Does someone have the (x)qcn available for flashing over QPST (or even over TWRP to change afterwards over QPST)?
I found different versions online but I think it's checked against model number; mine is: M1804D2SG (SI doesn't work)
Yes... I will change your IMEI!
Thanks!

honda4life1 said:
Hello All,
November update... It took a whole time to get my phone booting again but I don't have SIM or WIFI anymore.
I think my IMEI's are gone, even as MAC for WIFI.
I tried recovery image (that's what solved the boot problem).
I took backups but some parts seems to be corrupted so I can't recover from there.
Does someone have the (x)qcn available for flashing over QPST (or even over TWRP to change afterwards over QPST)?
I found different versions online but I think it's checked against model number; mine is: M1804D2SG (SI doesn't work)
Yes... I will change your IMEI!
Thanks!
Click to expand...
Click to collapse
Did you try to flash older build of stock rom?

Flash via MiFlash Tool, that worked for me

MiFlash tried,
I tried most recent version that was available, but yes that's an older version.
The corrupted data isn't even in the recovery rom.

https://forum.xda-developers.com/mi-a2/how-to/how-to-fix-sensors-camera-stock-pie-10-t3914885 I saw a few people on telgram that fixed wifi and sim with flashing persist partition.

mariosenta said:
https://forum.xda-developers.com/mi-a2/how-to/how-to-fix-sensors-camera-stock-pie-10-t3914885 I saw a few people on telgram that fixed wifi and sim with flashing persist partition.
Click to expand...
Click to collapse
Does not work unfortunately, just tried. In that topic it's more about sensors etc. not working.

Try flashing global firmware via twrp.

Reven jeremiah said:
Try flashing global firmware via twrp.
Click to expand...
Click to collapse
Also tried without errors but problem not solved.

Please someone upload.
My phone is still bricked :crying:

How may I help you? Give me instructions. Also specifically tell me how to remove my original Imei in that file. I'll then upload the files.

Imei becomes unknown during flashing custom rom

I have tried many custom roms but when i flash it, my imei number becomes unknown and i can't use my wifi and my sim is not detected. I tried and followed every steps but it happened every time. Then when i used the motorola rescue tool and flashed my own firmware i got my imei number back and sim and wifi are also working. I want to use a custom rom, which custom rom should i use?

aniruddhapal said:
I have tried many custom roms but when i flash it, my imei number becomes unknown and i can't use my wifi and my sim is not detected. I tried and followed every steps but it happened every time. Then when i used the motorola rescue tool and flashed my own firmware i got my imei number back and sim and wifi are also working. I want to use a custom rom, which custom rom should i use?
Click to expand...
Click to collapse
I tried with leveno app and I can back it up, but still got null baseband not found. I know I asked from you a lot but is there anyway backup EFS and presit (sorry my spelling) into an twrp backup?
Because even I flash the stockrom, it dosent find IMEI numbers and the carrier