Revamped version of the iPhone 3G with faster processing speeds. Repair of this device is similar to the 3G, and requires simple screwdrivers and prying tools. Model A1303 / 16 or 32 GB capacity / black or white plastic back.

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no sim card reported

18 month old 3gs suddenly reports "no sim card"

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Perhaps there is something preventing the sim tray from going in fully and engaging in the sim tray disconnect circuit. Remove sim tray and blow some compressed air into the slot to see if you can remove any debris. Also make sure your sim tray is not damaged in anyway. Sometimes you may have to remove the screen and bend up the small brass lever to get it to have more spring action and make a better contact. Its on the bottom of where the sim tray sits.

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