IMEI or IMSI? I think it is the subscriber identity that is on the SIM that needs to be cloned, not the hardware identifier of the device (ie its the IMSI that

IMEI or IMSI? I think it is the subscriber identity that is on the SIM that needs to be cloned, not the hardware identifier of the device (ie its the IMSI that matters, not the IMEI). SIMs and SIM burners can be purchased trivially on the open market, and cloned without too much difficulty. Although, a social engineering attack on the employee at the cellphone store is a superior method since it automatically gives you a "known good" SIM with the operator's keys, etc.