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  1. #1
    dtvonly
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    Hi. I am with ATT. My question is...my ATT sim card allows me to hook up to ATT GSM network. But it also allows me (my ATT phone) to send text messages to other non- ATT phones. How does this work? Is this a very deep and detailed topic?


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  2. #2
    Frank Hope
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    Re: ATT sim card...

    Hello,

    It`s a technical question belongs to Networking experts,but i think message goes to specific Identity number of the sim card rather than a Network.When functionally sim card is allowed to send message and calls by Network Operators,so it will do so.Just like when we go out of credit it stops to make call and text.

    Thank,
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