three days ago I have received the update to Android 12 on my Galaxy S21 | S21+ | S21 Ultra 5G and, since then, the phone is almost unusable to make phone calls
Both sims reset themselves periodically, within minutes, dropping the network and any phone call in progress.
After trying to reset the network settings, the phone has started to request the pin for the sims at each reset, so I had to disable it. Keeping one or the other sim active only isn't changing the behaviour.
The diagnostic on the phone doesn't detect any issue even if run while the network is down.
Does anyone incurred in the same issue or found any solution? The phone is 3 months old...
Solved! Go to Solution.
So, after that one Samsung center refused to change the motherboard, another tried but Samsung cancelled the order of spares and now I don't have time to wait any more, I decided to downgrade back to A11 and it seems to be once again stable.
From the next version the bootloader should be different and not allow the downgrade to A11 any more, so if you have these problems, I would suggest to downgrade now, don't enter wifi during setup, go straight to software update and disable them before doing anything else.
For me, A12 can wait. I am not impressed with Samsung, one month of time wasted with a non-usable phone, and at the end I had to "solve" it by myself reverting back to the previous version of Android. Not good at all for a phone of this price.
Hi, thanks for the suggestion, unfortunately clearing the cache didn't work. After 10 minutes, both sims reset again.
I would keep the phone reset as last resort. All banking and security applications take a very long time to restore, it took me days to get the phone up and running when I bought it... so let's see if there is any other idea before trying that...