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Apple iPhone 4

iOS5

iOS4

iOS is the operating system software installed on your iPhone. To find out which version you have: Tap Settings, Tap General, Tap About, and view the version number.

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I can't turn on my mobile phone

This troubleshooting guide will take you through a number of possible causes
to help you find a solution to your problem.

We found 3 possible causes:

Your mobile phone isn't turned on correctly
Your mobile phone isn't assembled correctly
The battery is flat

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