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I have an old att sim card in my phone and when i turn it on it says invald sim and i cant get wifi

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You should be able to bypass that screen, but that will depend on the handset. You can goto att.com/wireless and select wireless, then support, then select your device, and use the tutorials if you are unable to get past that screen,

Posted on Mar 27, 2011

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Call ATT if you are using it on the ATT network and tell them to have the internet pay per use turned on. Then you will be able to receive MMS messages.

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