I’m currently using Gionee P5w. its a good cellphone. it never hangs. and it has got alot of security options. and battery back up isn’t that bad .its pretty good.I m using gionee s6s . Only one number I dont know I pressed encrypt contact on one number and that number shifted in private list. So that I cant see any call log history of that particular number.I don’t know where I pressed my phone I can’t see my call history again.Yes yes yes dude jio is working on gionee p5w but back button problem is main .