Question

Just got the tmobile android 12 update on my Oneplus 9pro global version and its causing issues



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WiFi Calling for T-Mobile on Android 12, regardless of whether you use the Global/NA, EU, or T-Mobile firmware, does not work.  A number of devices, including Pixels are experiencing the same issues with WiFi Calling with Android 12.  It is one of the many Android 12 issues that are going to be a problem well into the Android 13 release cycle.  

If you need WiFi Calling, like I do or just want your device to remain on a reliable firmware.  Use the MSM Tool for your device to roll it back.  This isn’t an easy process but excellent walk-throughs can be found on the XDA-Developers forums for this.  Once you roll back, which will completely wipe your device, so back it up if you value anything on it.  Enable Developer Options and turn off Automatically Install System Updates.  You will still get the annoying prompt for the update, which you can force close the system update app to get rid of until you reboot your device.  

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12 itself for the carrier variants has been a bit of a nightmare across the board..

I just updated my global version too thank got most things are fine but I lost the wifi calling option. Any help?

I’ve had nothing but issues since the update to 12.  My phone doesn't always charge fully overnight, I have to call people twice since the first call always drops/won’t connect, general slowing down of the system overall, and now I can’t receive phone calls?  This really isn’t making me interested in the OnePlus 10 at all.  I might have to go back to Sony or see if the Nothing phone is going to be any good.  There’s no point in having a phone that can’t receive any phone calls.  

*edit* also, the battery drains much faster than it used to with normal usage.

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Personally, using dynamic updates is a bad idea.  It just fragments the OS even more with the potential for way more issues.  Why is your bootloader unlocked?  You really should relock it and leave it locked.  If you used TWRP to convert it, then you should have done it the right way, using the MSM Tool method.  Most users running Android 12 have factory reset their device to eliminate a lot of issues.  This is always recommended with a major OS version update.  

agreed. keep in mind that when these updates are being worked on and tested its on a fully stock device..no additional apps etc ..so taking it back to being as close to stock as possible tends to help..not everyones cup of tea..and wont help you avoid bugs..but its usually a smoother download.

Userlevel 7
Badge +15

Personally, using dynamic updates is a bad idea.  It just fragments the OS even more with the potential for way more issues.  Why is your bootloader unlocked?  You really should relock it and leave it locked.  If you used TWRP to convert it, then you should have done it the right way, using the MSM Tool method.  Most users running Android 12 have factory reset their device to eliminate a lot of issues.  This is always recommended with a major OS version update.  

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Just a little update once the phone fully charger to 100% it stayed at 100% and then died after 4hrs. I plugged it and warp charging no longer works. Then it asked me to enable dynamic updates which i was hoping might fix some of the bugs. Instead it soft bricked my phone and only let me boot into fast boot. Not even the recovery menu worked anymore. I had to go learn how to put my phone into edl and was able to flash back android 11 woot!  Also turning off auto updates helps but i  would also recommend using adb and sending the command: adb shell pm disable-user com.oneplus.opbackup

 

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Always disable automatically update system in Developer Options.

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I didnt even ask for the OS and it downloaded even though i had it blocked...hold thing is broke equalizer is gone, fast charging gone, ask a load of questions all day annoying; drains battery, crazy layout..this was not a ONE Plus Update OS...camera is jacked up now; so is the screen record...going back to the original one...stop forcing upgrades on the sneak...restarted phone after it kept going slow for some reason...now i know why ..trying to install in the background !!!!!

Userlevel 7
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Android 12 in general is a mess on all devices.  Most of the major issues are with the OS at the core.  

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