Hi i have an s4 i9505.
It was bought from someone else so i cant go back to the store so i hope some people here can help me.
I flashed a GE rom on the phone and it got random reboots so i reflashed it to stock. It worked for 2 days and did a lot of reboots to test if it keept working. After those 2 days i wanted to insert another sim so i first rebooted to check if it still worked and it dit then i turned it off. I inserted the new sim (witch requires to pull the battery). I tried to boot it and it came to the unlock screen and even before i touched it it rebooted. It was stuck in this reboot loop.
The weird thing is that the more reboots toke place the shorter they took to get to a reboot. So the first time i got to lock screen after 2 times i didn't. Better said after 20 reboots it even rebooted in the startup sound. Now if i plug battery insert it again it does the same. If i leave the battery out for some time and put it back in it will boot again to lock screen (sometimes i can use it for 5 min before a reboot).
I already had done a new flash of stock firmware and also flashed cm10.2, cm11, GE4.4 and some more roms they all have the same problem.
I already replaced battery and didn't help a bit.
I hope someone can help me and give me a direction i have to look into.