iPhone 4 Signal & Reception Issues Solved!
In this video we show our users the three most common reasons why they would lose their reception & signal after a repair. These include:-
1) A network settings bug that affects IOS 6 users
2) Forgetting to re-connect the Reception RF cable or the connector popping off the logic board due to a bang
3) Damage to the signal circuitry due to removing connectors in a rough manner. This is especially true for the blue signal coil.
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iPhone 4 Reception Issues Video
In the photo you can see the signal coil which is one of the major reasons your iPhone 4 will lose reception after repair.