IPhone 5S flashes during phone call

terryh215

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Mar 11, 2012
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When I'm on a phone call the screen flashes on and off and stays off most of the time. I can't end the call or click the speakerphone option. What's causing this and how do I fix this?
 

kch50428

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Oct 22, 2010
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Could reinstall the iOS via iTunes... and if the issue persists and is easily replicated - going to an iTunes Genius Bar would let you know what options are... warranty replacement, AppleCare...
 

IAmSixNine

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Oct 10, 2011
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Has the screen been replaced? Sounds like its the proximity sensor either malfunctioning or being covered / blocked. Do you have a case on your iPhone?
 

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