A by product of reverting back to stock from gps radio when you relock and load 2.09/radio 1.30.60 and let the vzw cabs run the radio refurbish cab breaks your akey, breaks the dmu authentication, but does a complete limetime call and data rx/tx wipe so your phone appears to be brand new with 0 talk time
. However there is a big caution posted by imcokeman about potential underlying radio problems by reverting back.