What's the problem in my Micromax Yu Yunique and how much does it cost to repair it?

My macromax Yunique phone now a days disturbs a lot , while using phone,  its screen gets off and wallpaper selected by me in the phone gets change every time by its own , it seems that it is hanging all of the time. So, I wants to know how much of the it would take while being repared and what's the problem in the phone??

Hi Summysonki. I suggest that you back up all your contacts and files and then do a factory reset. If problem persist, have it checked first, maybe it's just a software issue.

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