Do you need to have credit on the free sim to unlock, i.e. have in use & call OUT for 30 days?
Have a SGS7, years out of contract but not used for ages & no simstill locked to VF.Could you have a free VF sim & simply keep ringing it from another phone so it is registered as "being used" for the 30 days or do you need to put credit on it & ring...