Will S-off void warranty?

Dinsdaleson said:

People think that unlocking phone in unauthorized way (S-Off) will be better for warranty rather than using htcdev, how is that?

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With s-off you can go from unlocked back to locked (vs relocked). I.e., you can fully revert the unlock and thus hide that it was ever unlocked.

I'm sorry but as I do with all these misconceptions I have to chime in here. Rooting, S-offing and installing custom roms cannot void a warranty as the warranty on an electrical item covers the hardware for faults, when not caused by human error.

If I install a custom ROM on a phone, and then the screen stops working, which has happened to me countless times in the past, I will simply send it to HTC and they repair it.

HTC, Carphonewarehouse, Orange, and Phones4u in the UK have never refused me a repair on a phone or indeed a replacement due to s-off or a custom ROM,

I traded in my old M7 with Venom rom on, S-off in phones4u, to get my M8 and they didn't even flinch at that either.

I am not saying anything beyond, most people asking this will s-off anyway, and if you really are scared of losing your warranty, you'll also find a way of getting it back to s-on and locked too.

wrong thread, multiple windows open, my bad

Czech service center's attitude: Due to UNLOCKED bootloader, warranty is void for motherboard. They treat the custom ROM as a SW damage. Although they've replaced the display (faulty pixels) under warranty.