Hello everyone, since yesterday I am having trouble with my iPhone 11. Yesterday morning I woke up and my phone was turned off, even though it was connected to the charging cable overnight (when I went to sleep it was on). I turn it on and everything seems fine. I open an app, scroll a bit and it completely freezes. After a bit, it turned off and turned on by itself.

This happened multiple times both yesterday and today. Sometimes the phone turns off by itself even when I'm not using it. Does somebody know what could be causing this? The phone was not dropped, nor did I spill anything on it.

I already booked an appointment with Apple on Monday, but I kinda want to know how much will this cost me to fix, just so I can brace myself.

Thanks!