Hello . I am samsung j7 ( 2015 model) user .and so many problem with us.( 1) .touch is very bed .( 2) some apps not working this samsung j7 phone ( 3) sound is very bed ( 4) most very most problem is BETTERY RUNNING TIME IS ( 100% ) only 2/3 HOUR .( 5) so many problem etc.and I chang my phone to lava x38 . my name is RONAK my PHONE NUMBER IS ??7984788628 ??