I got a used iphone 3G the carrier is at t and somehow my brother got it to take a

Dick Gilmore said:

prepaid sim. but data wont ? Data won't work. Loaded card nothing says not subscribed to data srvice. Is there a setting he missed

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Call the customer service and check the settings, sometimes there maybe an error due to that. Did you network unlock the phone? If it was not done correctly sometimes parts of phone may stop working. I suggest you can approach Unlock-zone.com and specify the country,locked network of iPhone.Based on the availability you can get the permanent unlock service along with free instructions.