Oneplus 6 unknown baseband, no imei and meid issue - OnePlus 6 Questions & Answers

Hello everyone this is my first post as i can't find the solution to this problem any help will be highly appreciated.
So in september 2020 i faced qualcom crashdump mode issue in my oneplus 6 i tried flashing it with msm tool many times but the issue was still there so i tried msm smt download mode and yes lost my imei number and the phone was still facing qualcom crashdump mode so i gave up and bought a new phone but this oneplus 6 was still with me and then few months ago i heard that the phone was booting up my reballing the emmc and then i asked mobile technician if they can do this so they warned me that there is a dead risk too means there was 50-50 chances of reviving the phone. I took the risk and yes my phone was revived but then i faced this issue of unknown baseband, no imei and no meid the technician was also not able to fix this so i am here i tried flashing different roms but nothing worked.
yesterday i don't know how but when i woke up in the morning i checked it and i was surprised that imei was back wifi was working but sim was not working so i restarted it and again everything was gone no imei, unknown baseband
If anyone knows how to solve this please help

Nimnim12 said:
Hello everyone this is my first post as i can't find the solution to this problem any help will be highly appreciated.
So in september 2020 i faced qualcom crashdump mode issue in my oneplus 6 i tried flashing it with msm tool many times but the issue was still there so i tried msm smt download mode and yes lost my imei number and the phone was still facing qualcom crashdump mode so i gave up and bought a new phone but this oneplus 6 was still with me and then few months ago i heard that the phone was booting up my reballing the emmc and then i asked mobile technician if they can do this so they warned me that there is a dead risk too means there was 50-50 chances of reviving the phone. I took the risk and yes my phone was revived but then i faced this issue of unknown baseband, no imei and no meid the technician was also not able to fix this so i am here i tried flashing different roms but nothing worked.
yesterday i don't know how but when i woke up in the morning i checked it and i was surprised that imei was back wifi was working but sim was not working so i restarted it and again everything was gone no imei, unknown baseband
If anyone knows how to solve this please help
Click to expand...
Click to collapse
Just use MSM tool. There are a few of them in the Guides section. Read instructions in the thread for that MSM tool, which involves installing certain drivers on your windows PC, as well as putting your phone in EDL (emergency download) mode.

optimumpro said:
Just use MSM tool. There are a few of them in the Guides section. Read instructions in the thread for that MSM tool, which involves installing certain drivers on your windows PC, as well as putting your phone in EDL (emergency download) mode.
Click to expand...
Click to collapse
Yes bro i tried using msm tool but i wasn't able to recover imei as well as baseband

Nimnim12 said:
Yes bro i tried using msm tool but i wasn't able to recover imei as well as baseband
Click to expand...
Click to collapse
i believe that you tick the SMT when flashing using MSM?
if yes, AFAIK you can try to flash using SMT again.

Did this work out? I'm in a similar position with my Oneplus 6 and can't get Wifi or IMEI back.

I have same issue brother no sim wifi baseband unknown

yes bro flashing with msm smt download fixed my problem you can give it a try
once your baseband is fixed than imei restoration is easy

I try to flash whith smt but if give error after some time start flash

Anyone fixed this issue or not?

i flashed a couple times with msm (tmobile version), but this didn't fix my issue of unable to turn on wifi. this msmdownloadtool installed tmobile android 9.0 stock rom which didn't help fixed the issue. i then tried full resets and wipe data. still didn't work. i was going to give up, then i thought just do System Update thru cell data (since no baseband means no wifi). it installed the android 10 stock rom, and fixed the issue. now i have regain baseband and wifi.
hope this help anyone with the same issue

It could be a HW problem with the network IC (very common) but trying SW solutions like flashing first is advised

Related

No 4G only 3g with 44s Modem. No other Modem works . IMEI and Baseband still there.

Hey I really appreciate any help that you can provide. I will tell the long story. My phone got corrupted while flashing different custom ROMs. Oxygen was the culprit. It completely damaged all the partition of my phone. So I repaired via 9008 modem loader using COLOR OS flash tool. then I found there is no baseband and IMEI. EFS partition damaged and I didnt have a backup. Damn it!!!!! Tons of research and googling I found how to use QPST tool by Qualcomm. I retrieved QCN file from friends ONEPLUS ONE (16gigs) and flashed it to my phone (64gigs) and edited the IMEI to my one. Rebooted the phone. tada. I got wifi bluetooth everything running. Phone signal just connects and drops every sec. It wont stay connected. but it is detected. then I thought it might modem issue. I tried every single modem out there but no luck. Finally flashed CM11s 44S Modem. Kaboom. Got the network running. but sadly it will only connect to 3g. I cant connect to 4g. No Other modem works.
1. Only get 3g service via 44s modem on any vanilla rom.
2. No other modem works.
3. Proximity sensor acts really weird. If a call comes Then I have to restart my phone to get the screen lit back. Fixed by flashing proximity fix
4. Baseband is always unknown with 44s Modem but has 3g network connectivity.
5. Other modem shows baseband but no connection even though it is detected.
Please help me guys.. What am I missing. any help appreciated.
re
Aki07 said:
Hey I really appreciate any help that you can provide. I will tell the long story. My phone got corrupted while flashing different custom ROMs. Oxygen was the culprit. It completely damaged all the partition of my phone. So I repaired via 9008 modem loader using COLOR OS flash tool. then I found there is no baseband and IMEI. EFS partition damaged and I didnt have a backup. Damn it!!!!! Tons of research and googling I found how to use QPST tool by Qualcomm. I retrieved QCN file from friends ONEPLUS ONE (16gigs) and flashed it to my phone (64gigs) and edited the IMEI to my one. Rebooted the phone. tada. I got wifi bluetooth everything running. Phone signal just connects and drops every sec. It wont stay connected. but it is detected. then I thought it might modem issue. I tried every single modem out there but no luck. Finally flashed CM11s 44S Modem. Kaboom. Got the network running. but sadly it will only connect to 3g. I cant connect to 4g. No Other modem works.
1. Only get 3g service via 44s modem on any vanilla rom.
2. No other modem works.
3. Proximity sensor acts really weird. If a call comes Then I have to restart my phone to get the screen lit back.
4. Baseband is always unknown with 44s Modem but has 3g network connectivity.
5. Other modem shows baseband but no connection even though it is detected.
Please help me guys.. What am I missing. any help appreciated.
Click to expand...
Click to collapse
1- Check If you have IMEI and IMEI sv and it's the IMEI that shows on box.
2- if no. 1 is true then check another sim card another operator ( to be sure that carrier is not blocking your IMEI for some reason).
3- if other operator's sim worked contact your carrier to check problem with them.
ahmedazab said:
1- Check If you have IMEI and IMEI sv and it's the IMEI that shows on box.
2- if no. 1 is true then check another sim card another operator ( to be sure that carrier is not blocking your IMEI for some reason).
3- if other operator's sim worked contact your carrier to check problem with them.
Click to expand...
Click to collapse
Hey thanks for the reply. I do have my IMEI from the box. I flashed QCN file using QPST tool and applied my IMEI but the thing is I only get 3g. 4G is not detected. Im not sure if something has to do with baseband files. But my friend is from my place and he gets 4g just not me. If I use any other modem other than 44s Modem the network will be detected but won't connect so i cant make or receive calls or anything related to service provide.. Do you know what to do ?
Aki07 said:
Hey thanks for the reply. I do have my IMEI from the box. I flashed QCN file using QPST tool and applied my IMEI but the thing is I only get 3g. 4G is not detected. Im not sure if something has to do with baseband files. But my friend is from my place and he gets 4g just not me. If I use any other modem other than 44s Modem the network will be detected but won't connect so i cant make or receive calls or anything related to service provide.. Do you know what to do ?
Click to expand...
Click to collapse
Okay let's make some tweaks :
1- backup modemst1 and modemst2 using dd (I don't trust qcn backup ) and copy them to your computer I also prefer to backup persist and fsg
2- download NEVER_SETTLE from https://forum.xda-developers.com/oneplus-one/help/fix-brickloop-audio-fx-fc-efs-corrupt-t2879061 (you will find commands to backup mdemst1 and modemst2)
3- flash only persist using fastboot and reboot to system and check everything again.
other partitions locations :
/dev/block/mmcblk0p18 (fsg)
/dev/block/mmcblk0p15 (persist)
ahmedazab said:
Okay let's make some tweaks :
1- backup modemst1 and modemst2 using dd (I don't trust qcn backup ) and copy them to your computer I also prefer to backup persist and fsg
2- download NEVER_SETTLE from https://forum.xda-developers.com/oneplus-one/help/fix-brickloop-audio-fx-fc-efs-corrupt-t2879061 (you will find commands to backup mdemst1 and modemst2)
3- flash only persist using fastboot and reboot to system and check everything again.
other partitions locations :
/dev/block/mmcblk0p18 (fsg)
/dev/block/mmcblk0p15 (persist)
Click to expand...
Click to collapse
Hi I tried still no LTE. Stuck with 3g. Can't even change network. Any other idea
Aki07 said:
1. Only get 3g service via 44s modem on any vanilla rom.
2. No other modem works.
3. Proximity sensor acts really weird. If a call comes Then I have to restart my phone to get the screen lit back. Fixed by flashing proximity fix
4. Baseband is always unknown with 44s Modem but has 3g network connectivity.
5. Other modem shows baseband but no connection even though it is detected.
Please help me guys.. What am I missing. any help appreciated.
Click to expand...
Click to collapse
Same problem, I don't get 4g network. Tried everything . On restarting Even in 3g it takes around 30 seconds to regester the sim-network.
bablu048 said:
Same problem, I don't get 4g network. Tried everything . On restarting Even in 3g it takes around 30 seconds to regester the sim-network.
Click to expand...
Click to collapse
I hope someone will help us to fix this issue. What did you do ? I bricked my phone flashing Oxygen OS.
Aki07 said:
I hope someone will help us to fix this issue. What did you do ? I bricked my phone flashing Oxygen OS.
Click to expand...
Click to collapse
IDK what i did my opo was dead for around 3 months, the screen was responsive but totally black. then managed to recover from it then bricked it.
just figured it out. I am on my own build of XOSP[maybe it had problem idk] but had to flash my efs[64gig] backups and got my original imei back [earlier i had restored to a different imei qcn file may be it belonged to a 16gig opo] and also got 4g signal but still no baseband.
Then flashed COS13.1.2 and got baseband back, now the proximity is also working as it should and also got LTE working and instant signal on restarting the device. Now again back on XOSP everything works. If you need i can pm the efs files.
bablu048 said:
IDK what i did my opo was dead for around 3 months, the screen was responsive but totally black. then managed to recover from it then bricked it.
just figured it out. I am on my own build of XOSP[maybe it had problem idk] but had to flash my efs[64gig] backups and got my original imei back [earlier i had restored to a different imei qcn file may be it belonged to a 16gig opo] and also got 4g signal but still no baseband.
Then flashed COS13.1.2 and got baseband back, now the proximity is also working as it should and also got LTE working and instant signal on restarting the device. Now again back on XOSP everything works. If you need i can pm the efs files.
Click to expand...
Click to collapse
Please do email me the link to download it. Upload it in mediafire. [email protected]. It will be really helpful if you can send me the efs file.
Aki07 said:
Please do email me the link to download it. Upload it in mediafire. [email protected]. It will be really helpful if you can send me the efs file.
Click to expand...
Click to collapse
FYI your IMEI will be lost if you do so.
So I suggest to backup your partitions first in case of everything goes wrong.
Any way I have qualcomm stock efs partitions with 0 IMEI in case if you need them
ahmedazab said:
FYI your IMEI will be lost if you do so.
So I suggest to backup your partitions first in case of everything goes wrong.
Any way I have qualcomm stock efs partitions with 0 IMEI in case if you need them
Click to expand...
Click to collapse
Yes please. Can you send it to my email ? And apply my Imei through RF NV manager?
Aki07 said:
Yes please. Can you send it to my email ? And apply my Imei through RF NV manager?
Click to expand...
Click to collapse
IMEI is encrypted so if you do so, you will see it in settings but network carrier will receive it 0. This means that you won't get 4g also only 3g. So I personally prefer that you flash efs of [MENTION=bablu084;70545585]bablu084[/MENTION] this gonna work except you're two in the same country.
ahmedazab said:
IMEI is encrypted so if you do so, you will see it in settings but network carrier will receive it 0. This means that you won't get 4g also only 3g. So I personally prefer that you flash efs of [MENTION=bablu084;70545585]bablu084[/MENTION] this gonna work except you're two in the same country.
Click to expand...
Click to collapse
After flashing his efs my sim card is not getting detected
Aki07 said:
After flashing his efs my sim card is not getting detected
Click to expand...
Click to collapse
I will send you original qualcomm efs but firstly you should backup all your data even fsg partition with dd command

imei restored but still no signal issue,mob detects my network name but sigal issue

imei restored but still no signal issue,mob detects my network name but sigal issue
refer this comment - https://forum.xda-developers.com/showpost.php?p=72987547&postcount=25
or this post - https://forum.xda-developers.com/lenovo-p2/help/suggestions-deleted-modem-files-sim-t3598615
rajakali1705 said:
imei restored but still no signal issue,mob detects my network name but sigal issue
Click to expand...
Click to collapse
I almost grazed like donkey in XDA for no signal issue on P2, bcz before I never faced this situation of no signal, still I didn't face no imei situation for my p2..only think I need to know is imei/ flashing modem on bootloader unlocked device or rooted phones...search qpsk tools and so others....refer this link below for the process how to write imei on Qualcomm device, and do a search related for p2.
http://en.miui.com/thread-260943-1-1.html
I have never faced imei issue, to search and try some clear process
Hard bricked phones....only way is through QPST via Qfil or QSB via SDfuse methods can fix all sorts like no fastboot, bootloader is impossible. Thing is Lenovo need to release those files. Already some Lenovo got those files and Zuk. I search will ever those be released. Yes they are....
Try below process, you dont get signal and has imei....
https://forum.xda-developers.com/le...cial-twrp-lenovo-p2-3-0-t3533659/post73506567

[Fixed] My SM-G955U Has No IMEI or Baseband

EDIT:
I was able to fix it! I had to install a custom ROM to obtain root and delete my EFS partition.
So, here is a bit of a story I will try to keep short.
I went to Vietnam and bought a S8+ from there.
It was a US S8+ from Sprint.
I used it fine there but when I came back to states I tried to put my Verizon sim in and it doesn't work.
I don't get any signal. But I am able to see Baseband and IMEI.
So, I tried to use Odin and flash one of the SM-G955U1 Firmware.
Now, my phone is weird and out with no Baseband or IMEI.
So I try to flash back to firmware it was on.
Same thing.
Any ideas why my S8+ is like this?
MLIGN said:
So, here is a bit of a story I will try to keep short.
I went to Vietnam and bought a S8+ from there.
It was a US S8+ from Sprint.
I used it fine there but when I came back to states I tried to put my Verizon sim in and it doesn't work.
I don't get any signal. But I am able to see Baseband and IMEI.
So, I tried to use Odin and flash one of the SM-G955U1 Firmware.
Now, my phone is weird and out with no Baseband or IMEI.
So I try to flash back to firmware it was on.
Same thing.
Any ideas why my S8+ is like this?
Click to expand...
Click to collapse
Can you get into recovery/download mode now? What was the last known version of software you know that was on your phone?
If you can get into recovery, what info are in those details?
JeffDC said:
Can you get into recovery/download mode now? What was the last known version of software you know that was on your phone?
If you can get into recovery, what info are in those details?
Click to expand...
Click to collapse
Sorry for the long wait. If you are still interested.
CARRIER: SPR
RPMB fuse blown
RPMB PROVISIONED
CURRENT BINARY: Samsung Official
SYSTEM STATUS: Official
FRP LOCK: OFF
WARRANTY VOID: 0x0
QUALCOMM SECUREBOOT: ENABLE
RP SWREV : B3(1,1,1,1,1) K2 S3
SECURE DOWNLOAD: ENABLE
DID: 205EDC8B7351
- duplicate
MLIGN said:
- duplicate
Click to expand...
Click to collapse
What happens if you restore from the OEM function?
Try downloading custom recovery and flashing a custom rom. You will lose samsung pay but you might have a working phone it's a chance I would take if it was me. Your baseband is messed up try just flashing your carrier baseband . These are just ideas good luck
Sent from my [device_name] using XDA-Developers Legacy app
If flashing a custom ROM will fix your phone then so will downloading latest official Samsung ROM and flashing via latest Odin .
The second option above would be the best to try unless you're happy to have a custom rom and lose Samsung pay and anything that relies on Knox being functional
paul_59 said:
If flashing a custom ROM will fix your phone then so will downloading latest official Samsung ROM and flashing via latest Odin .
The second option above would be the best to try unless you're happy to have a custom rom and lose Samsung pay and anything that relies on Knox being functional
Click to expand...
Click to collapse
Update on the post, I sent it into Samsung. I should hear word soon if they can fix it and how much if anything.
Jtag dead phone to life and rewrite IMEI
First of all my phone is the s8+ G955fd, but I am sure that the people that helped me can help most Samsung owners with bricked phones.
My phone ended up being stuck on the first boot screen, I couldn't get into recovery or download mode. I installed TWRP and after that I lost my IMEI numbers( dual sim), so I tried to reflash stock and thats when i became bricked. I searched someone to help and found reference to the Fonefunshop in England. I sent it there and they said that the eMMC chip was bad. I searched for someone who could write to it or put a new one on the motherboard . I found A2Z cellular in Ottawa Canada. They used jtag to restore it to stock and they told me that the Fonefunshop had not opened the phone which is necessary to use jtag as they claimed, so avoid them.
The phone was now back doing everything it should except the IMEI's were null like before. I gave them the original IMEI's and the phone is working like new.
If your Samsung is bricked these guys can probably fix it and it won't cost much to find out.
the SM-G955U has a locked bootloader, so people should not be telling you to flash a custom recovery or custom ROMs. there is only one way to get root on this phone, through the samfail exploit, and safestrap is the only working recovery. I don't believe it supports CDMA networks but I'm not 100% sure on that. I have this device and I'm only aware of GSM carriers using it.
Just an update on this issue. I still don't have a working Baseband or IMEI. Any clues?
I was able to fix it! I had to install a custom ROM to obtain root and delete my EFS partition via ADB.
MLIGN said:
I was able to fix it! I had to install a custom ROM to obtain root and delete my EFS partition via ADB.
Click to expand...
Click to collapse
Hi. Can you detail how you fixed you phone please? What custom rom did you use and the steps you used please? I have the same phone with the same problem.
Thanks
MLIGN said:
I was able to fix it! I had to install a custom ROM to obtain root and delete my EFS partition via ADB.
Click to expand...
Click to collapse
Be very careful with doing that. It can cause the EFS (the partition that controls IMEI, Mac and a few other things) to be completely corrupted. Which will cause the device to be useless without fixing it.
Now a little heads up. As messing with the IMEI is illegal in many countries (the US being one of them) There are only 2 ways to fix an IMEI issue allowed on XDA.
1. Restore the backed up EFS partition
2. Return it to the OEM to be repaired.
What did you do after you deleted EFS? I can delete in Combination but I dont get the IMEI number back.
Please I need all XDA members assist ,because of I mistake delete EFS with combination file on my G955U VZW , I have null imei number, then I repair it by flash qcn with z3x Samsung tool , but still I have IMEI number but emergency call only is still display without service ,

[Help] Recovered from soft brick, no service now

Soft bricked my phone installing the android 10 open beta.
All good, recovered it (i have lots of experience rooting and modifying phones, but NOT with the a/b structure)
Now i have no service no my phone, but the sims are detected, as during the set up, it shows both of my numbers.
Both the imei numbers are there if i dial *#06#
Unlock was a while back using simple fastboot flashing unlock, and my previous set up was stock, with arter97 kernel & magisk.
I fastboot flashed 2 roms i could find (21BA and 21AA and neither made a difference) - so i'm factory reset too. I'm on Three UK if anyone knows how to get this sorted!
I had the same problem yesterday. Android flashed q, did not work, then returned to 9.5.11, but there was no service.
I reset my device using msm tool. Visit the Msm tool topic, my problem is solved.
manor7777 said:
I fastboot flashed 2 roms i could find (21BA and 21AA and neither made a difference) - so i'm factory reset too. I'm on Three UK if anyone knows how to get this sorted!
Click to expand...
Click to collapse
You've answered it yourself. You flashed the wrong rom with 21AA. 21BA is for Europe.
As mentioned above, the MSM tool will sort it.
hallo dare said:
You've answered it yourself. You flashed the wrong rom with 21AA. 21BA is for Europe.
As mentioned above, the MSM tool will sort it.
Click to expand...
Click to collapse
Actually, that wasn't the issue. I've had both on my device before with full functionality. The problem was, when i went back to stock it switched to slot B. was as simple as switching back to A. Now i've updated to open beta 1, i'm back on slot b and all working

Network Error Oneplus 8 T mobile

I just tried to repair the imei of my device and now I lost my network. These are the steps I followed:
Step 1: Downgrade to android 10.
Step 2: Unlock bootloader.
Step 3: Take backup of .XQCN file
Step 4: Convert into Global rom android 10
Step 5: Open diag port with *#801# and Repair IMEI.
(I used Miricle box 2.58 cracked version)
Step 6: reboot and update device.
After IMEI repair I lost my network. then I tried to restore the xqcn file It successfully restored but still there is no netwok.
I tried to update device and again used msm tool to emergency download but still there is no network.
Need help please.
I have OnePlus 8 t-mobile same problem here what to do any Idea.
sarfraz86 said:
I have OnePlus 8 t-mobile same problem here what to do any Idea.
Click to expand...
Click to collapse
I tried so hard but didn't get any success. And none is helping me
I think you also lost baseband like me. Hopefully anyone come to help..... Tried so many things. If i get results from any thing will help you sure.
sarfraz86 said:
I think you also lost baseband like me. Hopefully anyone come to help..... Tried so many things. If i get results from any thing will help you sure.
Click to expand...
Click to collapse
I lost the baseband and imei but I'm able to recover them but after recovering still there is no network. I asked a very experienced technition but He also don't have any solution.

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