I hope this is the right place to ask this question.
I'm using a Samsung S4 Active with stock Samsung-branded Android. Since I updated the OS from
4.4.2 my phone is sometimes turning itself off, trying to restart and failing, trying again. Maybe around 3 times until nothing is happening anymore.
The only way I can restart the phone is, that I connect it to power. Furthermore I feel that it only happens when my battery is lower than 60% - but still way higher than 0%!
I updated the phone via the Samsung-thingy which keeps popping up. So nothing external...
I factory-resetted my phone because I thought it might solve the problem - but unfortunately it didn't.
Any ideas what could be the solution for my problem? I googled quite a lot but couldn't come up with a hint...