Read the post above. If you're from Europe, you got no problem asking for RMA, even if you've unlocked it.
But to get peace of mind, you can always flash the original logo ( may require unlocking the bootloader again, cos I'm not sure if you can flash unsigned images if the bootloader is locked, then lock it again).
Mental issues lead to the use of long signatures
Care much for receiving Thanks?Bitching at the others about it doesn't help, instead better stfu and gtfo.