So I just got an unlock code for my torch and I'm wondering would a full reset meaning delete eeevvveerything lock up the phone again or once unlocked it doesn't lock up again no matter what? Thanks
The vendor.xml file tells DM what carrier the OS is from, and if it's not from your carrier, DM won't allow the install. While this usually only happens with official releases (vendor.xml files with leaked OSes are usually blank), it's a good practice to always delete the file regardless, as it's usually the #1 culprit in installation issues.