I am using IOS 9.2,But this IOS is full of Bugs.Earlier i was using IOS 7.0.3 for 3-4 days on my IPHONE 5S 64GB but face no such problem on that.Kindly help me out.Whenever i receive any call,My phone display switched off and phone ringing.when i reopen the iphone i heard the incoming ringing tone but no caller ID.Kindly help me out?
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