for over one week now I am facing this issue: My phone gets randomly freezed first and then like after ~5 seconds it completely crashes. It doesn’t even matter what I am doing, it freezes all by sudden while using any app. And it happens on any time.
For example: When I was watching a video with VLC it suddenly stopped playing. The screen didn’t react at all and then like after 5 seconds it completely crashed, meaning that the phone got switched off.
This even happened when I was reading an article on Firefox. I suddenly could not scroll down, the screen again didn’t react at all and like after a few seconds, the phone again crashed and was switched off.
A few times I encountered that my phone crashed while it was in my pocket, meaning while it was not in use and the screen was locked.
Every time I had to press the power button for like 10-15 seconds to switch the phone on again.
Strange behaviors I noticed:
It started after I flew to another country and after starting to use LTE via the SIM card plugged in to the second SIM slot in my phone. This SIM Card is country specific and was already plugged in a long time ago before the flight. Right now I am still in this country and when I go back to my country again I will start to use LTE over the SIM card plugged in to the first SIM slot.
Every morning, when I charged my phone over night this issue occurs even a few times in a row after switching it on the first time in the morning. I always shut down my phone before I go to sleep.
The icon of the trust agent does not show up anymore on the status bar while using an app.
My phone showed me sometimes a different battery level than it was before having restarted the phone after a crash.
I was using LineageOS 17.1 but yesterday I flashed and factory resettet to 18.1 in the hope to get rid of this issue. But still it happens.
So what’s going on and how can I solve this issue? I am in some kind of worry because I bought my phone two months ago.