I just recently got a forced update on my S21 Ultra (AT&T variant) to Android 12 and this new version has introduced a bug that is giving me a lot of headaches while taking calls at work. on speaker phone or regular phone, the caller hears their own voice being fed back into the call and it's really disorienting for them. the only way to fix it is for me to either restart my phone (which the issue will come back after a call or 2) or use a bluetooth headset to talk.
this is really frustrating especially when the update was forced upon me without the ability to skip the update.
Build number SP1A.210812.016.H998USQU4BUK7
Service provider software version: SAOMC_SM-G998U_OYN_ATT_12_0017 ATT/ATT,ATT/ATT
I really need this to be fixed asap because making calls has been pretty excruciating and it is literally crippling the main function of the phone.. the ability to make calls.
Reboot phone to Maintenance/ Recovery screen and Wipe Cache Partition and Repair Apps
Worth a try
Why I'll never be tied to a carrier...
Press and hold Side key until you see Power Off - select it to power off the phone.
Now, off to the Maintenance (Recovery) screen:
Press and HOLD the Volume Up key, and while holding, press and HOLD the Side key.
When the Samsung splash screen appears, release both keys. Within a few seconds, you'll see the Maintenance screen, with a number of menu options.
Use the Volume Down key to highlight Wipe Cache Partition. Press Side key, select "Yes".
Now, Use Volume key to highlight "Repair Apps" (should be last menu option). Use Side key to select it.
The phone will automagically restart. Let the phone settle down for a couple of minutes.
yeah, unfortunately my phone was about to die and it was a good deal.
luckily enough i did a check for update and by chance there was an update available. applied the update and i haven't heard a complaint since.
I tried do wipe cache partition and repair apps. no luck.
i also applied the update that i saw previously and it still doens't work.
callers are hearing themselves whether it be on speakerphone or off.
I went after at&t recently and they pushed ANOTHER update. i haven't heard any complaints yet.... but I haven't ask. will update when i talk to someone else who is not on AT&T.
I should also mention that I have also found out that this is a weird issue that only happens when a non AT&T customer calls my phone. if other AT&T customer calls my phone, there's no echo. it's super duper weird.