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Which GSM system number is hard-coded into the phone and identifies your physical phone hardware to the cellular tower?


The International Mobile Equipment Identity (IMEI) is a one-of-a-kind number that is assigned to each physical phone. The device contains a hard-coded unique identifier. The Product Release Instructions (PRI) explain how to connect your device to the network. A MAC (Media Access Control) address uniquely identifies a network interface card, while an IMSI (International Mobile Subscriber Identity) number uniquely identifies the account holder.

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