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Repair information and guides for the fifth generation of iPhone. Model: A1387

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Full signal bars no signal?

Recently changed out a digitizer for a 4s and now I can't make or receive calls. I have checked and cleaned all antenna connections to no avail. All of the similar issues I find online state that the phone displays a weak or no signal, mine is very strong, but the phone does not place calls or ring. Please help.

correct provider also

Answer this question I have this problem too

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3G also displays a very strong signal

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2 Answers

And you do get the right info in the top left corner about your provider? A connection from the sim card to the logic board may be the problem.

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is this connection replaceable/repairable?

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correct provider also

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Have you tried removing the micro sim, cleaning it with a micro fibre lint free cloth and inserting it back in? The micro sim can move slightly when you consider the use and abuse we give our iPhone 4S'.

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also tried cleaning multiple times

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