When a phone is bought from a shop, it is often "locked" to a network. This means you can only use SIM cards from that particular network. Unlocking makes it possible to use any SIM card in that phone.
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When a phone is bought from a shop, it is often "locked" to a network. This means you can only use SIM cards from that particular network. Unlocking makes it possible to use any SIM card in that phone.
Related topics:
<Insert links here>