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Second generation of iPhone. Model A1241 / 8 or 16 GB capacity / black or white plastic back. Repair is more straightforward than the first iPhone. requires screwdrivers, prying, and suction tools.

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Earpiece Speaker works but not the Proximity Sensor

After replacing the battery I found that the Proximity Sensor doesn't work. The earpiece speaker works fine which bring me doubts if the problem is the cable #3. Help please? Thanks!

Just in case I did all the resetting available including restoring the phone.

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I changed the cable #3 but still having the same problem.

Answer this question I have this problem too

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It does sound like Flex Cable #3 is the problem. You could carefully open the iPhone, and reconnect #3 to see if this fixes it. Or replace Flex Cable #3.

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The #3 ribbon can be damaged to the point where the ear piece still works and proximity sensor doesnt, or vice versa. Swap it out and you should be fine. DIY here:

iPhone 3GS Proximity Sensor Ribbon Replacement

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