iPhone loading and locking itself

my iPhone 7 is going onto a black screen with the white loading symbol and then goes onto the lock screen? happens all the time, on apps or on home screen. Can anybody help me on what to do? I've restarted my phone and also reset it and the same thing is happening.

iPhone 7, iOS 11.1.2

Posted on Dec 2, 2017 1:54 AM

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iPhone loading and locking itself

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