I have some issues with my S4 and want to have it treated on warranty, but the major issue is the USB connector NOT working.
It is charging somehow, but disconnecting and connecting all the time.
Another issues I have are the switching between Edge and HSPDA+, which is mostly not working, I have to switch it manually to H+ or GSM.
Also my screen is blinking, so I will send it back and never want to se that again.
But the problem is, that the original rom I had was Polish (it is unofficial distribution in my country) and I flashed it a few times, rooted, tried several ROMs but reverted back to original. Now there is German Rom installed - the official one, no Root or recowery, but I think the internal counter (Knox or how is called) is set up.
Is there any way to put it to the original shape with only access through SD card? Or do you think, will the service look for that counter?
Thanks for your replies.