GSM cell phones use a SIM (Subscriber Identification Module) card that stores subscriber data. The SIM card is issued by a carrier and provides cell service by activating any phone into which it is inserted.
A locked phone will only recognize a SIM card from
Unlocked phones give consumers more control of plans, pricing, and services and make carriers work for you.
Unlocked phones give consumers the freedom to move your SIM card from device to device without signing another carrier contract. This means consumers can easily switch to a different phone whenever they want. This gives them more freedom if [...]
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