Tsundere Chen says to YSITD
@S_ean QFuse is a hardware feature by Qualcomm. It basically is a hardware function that changes permanently and cannot be reversed once triggered (via software) It enables a way to irreversibly denote that a phone has been unlocked before, even if it has been relocked after This article on unlocking a Motorola Altrix bootloader talks about QFuse in detail. http://blog.azimuthsecurity.com/2013/04/unlocking-motorola-bootloader.html?m=1