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Fourth generation iPhone. Repair is straightforward, but the front glass and LCD must be replaced as a unit. GSM / 8, 16, or 32 GB capacity / Model A1332 / Black and White. This page aims to help users troubleshoot, fix, and seek help for the iPhone 4.

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slight impact damage, now dropping signal

I under take a lot of iphone repairs some board level stuff as a side buisness.

I have an iphone 4 that has been dropped on the floor

not enough to break the screen but enough to make the signal sporadic sometimes fine other times goes to searching mode and also drops calls.

I have transfered logic board into a know working assembly and the problem is still there.

any tips as to what might be the problem thanks

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You may have damaged the transmit/receive unit on the logic board. You may have to replace the logic board to fix the problem.

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