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

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My phone no service at lockscreen

my phone no service when I lockscreen, so I cant't receive a call, message or notification anithing until unlock screen and searching network again

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Most Helpful Answer

So every time you lock the phone and are in the lockscreen, your phone goes to searching and no service right?

What is the history of this phone, did something happen before to cause it? Could be a loose antenna cable causing this issue.

Check these two guides. You don't have to physically take them out, just check if the cables are plugged in firmly.

iPhone 4S Cellular Antenna Replacement

iPhone 4S Upper Antenna Replacement

iPhone 4S Cellular Antenna Image

Guide

iPhone 4S Cellular Antenna Replacement

Difficulty:

Moderate

iPhone 4S Upper Antenna Image

Guide

iPhone 4S Upper Antenna Replacement

Difficulty:

Difficult

1 - 2 hours

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