Is there a field test mode for this phone, to adjust network settings and such?Making that significant of an upgrade the way you'd probably want to backup your data and do a complete reflash of your device - This is what I did - DL your latest firmware 2 a PC... samfw.com is my fave repository, and install the latest magisk on your phone. Use your PC to extract your ROM/firmware into a directory so you have the 4 files AP BL CP CSC and CSC_HOME which won't be necessary.
I like my device encrypted because I'm a financier, but If you do like to use custom recovery Afaneh92 made a TWRP port that's compatible, you'll find it with a search TWRP s21 ultra, you can replace the recovery with that if you so desire
Use your pc to copy the AP file to your device with MTP enabled - yes it's 7gb but that's why you bought the fast flagship right? LOL open magisk app and use it to patch the ap file in your downloads - then copy the results back to your PC. That's gonna go in the AP slot and will keep your root. your bootloader is unlocked that won't change with the upgrade as outlined.
BACKUP your data - a full wipe is necessary for good results. Flash it all in Odin and enjoy your android 12.
If you've lost root upon reboot, just use adb to reboot into download mode, and reflash just the modified .tar file patched by magisk with BL and HOME_CSC to keep from resetting your data again, and you should have root when you reinstall magisk.
Quck instructions, there are much more detailed tutorials for each step but I figure you already know most of this. Install Safetynet and resetprops and you're golden.
Seems smooth, everything works , battery will take a few days to settle but there is definitely no bad battery drain
If you or anyone can answer this for me, i'm losing my mind
How did you switch to TGY in the first place? did you manually input TGY into Frija and just flash that CSC?This is bizarre for me too. I am currently at TGY and hasn't come back to BRI (original). I tried flashing CHC then back to BRI/TGY but it then defaults to TGY. I can't come back to BRI anymore. I have also tried removing sim card while flashing either but it doesn't work.
Maybe this is dependent on the sim card that you have last plugged in? Don't quote me. I hope you find your answer.
So far, my only problem has been echoing for wifi calling. It seems another person has this problem but I haven't found this to be the case with other people.Will we see an update before July 1st on Friday I need it as my camera freezes sometimes and sometimes a video on YouTube freezes the sound continues but the video is frozen , they're the only 2 bugs I have,even after a factory reset and clean installed everything
Good luck mate... give it another day.. if this is ur daily driver, dont lose warranty just for the heck of it... its a very very expensive piece of machinery
If I haven't received the ****ty update today, I'll flash the USA XAA snapdragon version even if my phone dead .Quick question, does anybody know if we can move away from the TGY/BRI CSC to any other Snapdragon variant??
And still have a working rom?
The intervention of china/hongkong carriers is scary to an entent that this is not the only update being purposefully delayed..
Any advice from anyone who knows how to permanently move away to a different country rom is highly appreciated