Downgrade from OneUI 3 to 2

[RedP]

I have a Galaxy S20 UW on Xfinity Mobile that just updated to One UI 3 / Android 11.

The upgrade has absolutely destroyed the split screen / multitasking capabilities. I've had the firmware flashed by a Samsung Care person, and he told me reversion is impossible, but intense googling says that user @CHMultimedia might be able to help.

Baseband version G981VSQU1CTKH

tia

[CHMultimedia]

Yes, RedDogRabbit is correct.
Use this app, it's the one I use: https://play.google.com/store/apps/details?id=com.ccswe.appmanager.installer
No PC required for this one, it only uses Samsung Knox.
Disable the package that goes by the name of com.wssyncmldm. Re-enable it once the issue is fixed to get updates.
You'll know it worked as the option to update your device will have vanished from Settings

[RedP]

I'm not seeing that option

 

[CHMultimedia]

Yeah, search is broken in that version of the app. You have to scroll manually until you find one of the two apps called Software Update. One should have a purple icon with the good package name underneath. I'll give you a screenshot in one moment

[CHMultimedia]

Here is the app that you should disable.
Simply tap on its icon and press Disable

[RedP]

Yeah I disabled both and rebooted but the notification is still there in phone settings. I'm using a notification hider to cover the push notification

 

 

[Covis]

The new multitasking really **bleep**. Is it an android 11 thing or is it Samsung one ui bs?

[RedP]

Oof that's a good question.