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I put my sim card in a new phone and it asked for a subcity code does anyone know what this means?

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  • 1 decade ago
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    You've taken a SIM card from one network, and put it in another that is locked to a different carrier.

    An example: You have a Nextel SIM card, and put it in a phone that is locked to AT&T network, the AT&T phone which is locked won't operate with a Nextel sim card.

    Source(s): AT&T Sales Rep
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