Are ESN and SIM related?
I am venturing into repairing and reselling iPhones as refurbished and need to get a better understanding of the ESN and SIM. Is the SIM card the GSM version of the ESN (CDMA) number? Can a GSM phone really be locked by the carrier if the SIM card can just simply be replaced with a new one? And is the ESN really the MEID number? When I activated my wife's and my iPhones, the carrier asked for the MEID, not ESN.
Is this a good question?