Though I m not a big fan of apple but what I really like about iphone 6s plus is that u can use it in two modes. it comes flat like any other phone but if u want a curve body just put it in your pocket and press a little. one of my friends bought it few days after launch and within a week he encountered the same problem and he didn’t even remember when that happened coz it dosnt needs phone to be dropped or get hit by something.
I dont know any other major problem in that phone but spending that much amount and getting such a low quality is a great disappointment in itself. and they dont even replace the phone if u wanna get new one u will have to pay additional 20 thousand rupees for that.