why my iphone 4 always light every 20 seconds and then after 10 s

I have the iPhone screen light up the first time 20 seconds and the second after 10 seconds and the battery does not complement the half-day the iPhone system 7.0.4

iPhone 4, gsm

Posted on Jan 12, 2014 10:21 PM

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why my iphone 4 always light every 20 seconds and then after 10 s

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