Originally Posted by brorex
I shattered the screen on my phone called for the one replacement for free no problems there. I chose to get the replacement device instead of having them fix mine. Should I flash this phone back to stock before sending it back in? I have boot loader unlocked but not S-off the phone. Any thoughts or experiences welcome. Thanks
Sent from my HTC One_M8 using Tapatalk
I just went through this. Before I sent mine back I went S-off, locked bootloader, removed the tampered and relocked tags, and went 100% stock, I left it s-off since people say this trips the tags again and can cause other problems. They still tried to charge me $290 to replace the motherboard since it was unlocked (they check if you requested an unlock token even though this doesn't mean you used it). After arguing with them they finally said they would fix my phone for free since it was all stock ("HTC supported software").
Ultimately, you'll have to see what they say when you send it back. For some people, HTC hasn't said a thing even if they left s-on and had relocked tag, for others they charged them $290 no matter what. The only advice I can offer if this happens is to point out that there are two separate warranties, a Limited Warranty and an Expanded Limited Warranty (the screen replacement). The screen warranty says nothing about unlocking your phone voiding the warranty.