Why does ringing mode automatically enabled on the Samsung Galaxy J5?

I am using Samsung J5 from the past 5 months. Recently, whenever i keep my phone in silent mode, after some time it automatically switches back to ringing mode without me doing anything with the volume buttons. Is there any way by which this issue could be solved or do i have to replace the phone?




Can you check the volume buttons if they are loose? Maybe you accidentally press them.



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