Question OOS 12.0.0 Stable Update Cellular Network Fix

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xda9791

Member
Feb 7, 2020
21
3
Hi,

As you may know most of us is having this issue after the OOS 12.0.0 Stable Update, Cellular Network lost, No Signal, Outgoing call, and SMS.

The below method worked at least for me, let me know if worked with anyone of you please.

Please follow these steps :

1- Turn off your phone.
2- hold press volume-down button with power button.
3- keep holding these two buttons until fastboot recovery screen appears.
4- choose English.
5- you will see three options, Wipe data, reboot, and turn off.
6- tab "reboot".
7- when the phone boots normally, the signal is back :).
 

Anonymouze

Senior Member
Jan 22, 2013
89
46
Mülheim
OnePlus 9 Pro
Hi,

As you may know most of us is having this issue after the OOS 12.0.0 Stable Update, Cellular Network lost, No Signal, Outgoing call, and SMS.

The below method worked at least for me, let me know if worked with anyone of you please.

Please follow these steps :

1- Turn off your phone.
2- hold press volume-down button with power button.
3- keep holding these two buttons until fastboot recovery screen appears.
4- choose English.
5- you will see three options, Wipe data, reboot, and turn off.
6- tab "reboot".
7- when the phone boots normally, the signal is back :).
I wonder if that works. You only reboot your system...
 

xda9791

Member
Feb 7, 2020
21
3

Jomsha

Senior Member
Jun 18, 2021
52
22
I used to have internet connection, and I receive calls & SMS, But I cannot make outgoing calls and SMS.

try to follow these methods in link below, also it keeps updated so check regularly

I dont have the Advanced Reboot option unfortunately... And APN delete and update not working either..
 

pgrey2

Member
Jun 10, 2010
39
6
Bellevue
Has ANYONE figured out how to clear the cache (partition) ?
I updated yesterday, without reading anything first (I figured it was "stable", right ... 😲), and now I can't get my mobile-network to work (either 5G or reverting to 4G, including APN reset, etc) for more than a few seconds at-a-time.
I chatted w/support, who of course told me to clear the cache (I've had this fix other network issues in the past, stale DNS and such), and seemed puzzled that the option doesn't exist, in Recovery-Mode, you can only do a full-format, period...
So, I'm hoping someone here figured it out?
 

Jomsha

Senior Member
Jun 18, 2021
52
22
Has ANYONE figured out how to clear the cache (partition) ?
I updated yesterday, without reading anything first (I figured it was "stable", right ... 😲), and now I can't get my mobile-network to work (either 5G or reverting to 4G, including APN reset, etc) for more than a few seconds at-a-time.
I chatted w/support, who of course told me to clear the cache (I've had this fix other network issues in the past, stale DNS and such), and seemed puzzled that the option doesn't exist, in Recovery-Mode, you can only do a full-format, period...
So, I'm hoping someone here figured it out?
Yea , same problem here.
You can receive sms and calls. But you can't calling or sending sms... Mobile Data also working.. it's frustrating.
Support say clean cache. But there is no option to do so.. lame
 

pgrey2

Member
Jun 10, 2010
39
6
Bellevue
Yea , same problem here.
You can receive sms and calls. But you can't calling or sending sms... Mobile Data also working.. it's frustrating.
Support say clean cache. But there is no option to do so.. lame
Yeah, similar, except that I can only get *some* SMS, or perhaps "delayed" might be more accurate.
As such, I'm sort of locked out of both my Authenticator apps, which seem to not like the fact my mobile-data is sketchy (seems reasonable, actually), and then want to reset things, of course using SMS, but they require the codes to be "timely", which circles back...
Support is lost, if you ask me, they seemed confused about the cache issue, until I sent a pic, and then they just wanted to wrap up the chat, with no actual solution, other than "we'll have someone contact you in 24-48", which I seriously doubt will happen.
It's weird, almost like OP doesn't realize people use their phones for critical tasks, or they don't care, it's hard to say. If you go back and read some of the B2 threads (apparently the last B2 build was the release), it's more obvious that you shouldn't upgrade, and I wouldn't have, if OP had mentioned this, anywhere, in the release-notes...
I shut down backup/restore, right away, so I have a A11 backup, sitting there, now I just need to go find the right APK (support also had no clue there) and matching MD5 (yeah, I'm sort of paranoid about this), and cross my fingers, toes, and more... ;-]
 

Bunecarera

Senior Member
Mar 4, 2008
285
103
OnePlus 9 Pro
Has ANYONE figured out how to clear the cache (partition) ?
I updated yesterday, without reading anything first (I figured it was "stable", right ... 😲), and now I can't get my mobile-network to work (either 5G or reverting to 4G, including APN reset, etc) for more than a few seconds at-a-time.
I chatted w/support, who of course told me to clear the cache (I've had this fix other network issues in the past, stale DNS and such), and seemed puzzled that the option doesn't exist, in Recovery-Mode, you can only do a full-format, period...
So, I'm hoping someone here figured it out?

Stupid suggestion, but have your tried swapping Sim slots?

That seems to work for some people for getting 5g back...
 

davidz85

Member
Sep 5, 2011
43
4
hello all, same issue here.

i tried everything besides wiping data completely .

i do not want to do this before there is 100% confirmation that this can help.

about the suggested solution of trying the 2nd SIM card slot... i can see 2 sim cards options in cellular settings, but i dont see any other physical slot in my device to enter my SIM card, so i cannot try this method.

i dont understand how there is not patch for it, what we suppose to do in this case?

Thanks.
 

Bunecarera

Senior Member
Mar 4, 2008
285
103
OnePlus 9 Pro
hello all, same issue here.

i tried everything besides wiping data completely .

i do not want to do this before there is 100% confirmation that this can help.

about the suggested solution of trying the 2nd SIM card slot... i can see 2 sim cards options in cellular settings, but i dont see any other physical slot in my device to enter my SIM card, so i cannot try this method.

i dont understand how there is not patch for it, what we suppose to do in this case?

Thanks.

My 9pro has a second slot, marked SIM2, on the other side of SIM1...
 

davidz85

Member
Sep 5, 2011
43
4
Yes, but even if i had the 2nd sim card slot, im not sure that this would have been solved this mobile network issue.
 

davidz85

Member
Sep 5, 2011
43
4
Will it do the trick in this case?

edit - maybe wiping all data completely will fix this issue?
 
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