Apple India — mobile device issue with min a year

Address: 2b 46 kalptaru hills tiki ji niwadi manpada thane west, Mumbai City, Maharashtra, 400607

Hi have purchase iphone 6s plus last year and now suddenly i am facing issue in device. Iphone is in auto vibrate mode many times and many time auto silent. Device is not performing as per brand. When i submit my mobile i. Customer care than they told us that iphone now not exchange defective iphone and for service also i have to give some deposits. Which is not acceptable. My iphone is in warranty period and still i have to pay for service. Bad experience with apple.