i m using i phone6 . recently i have faced a new problem, while i m trying to search a contacts at contact app and search a name by alphabet 'R" that time contacts app automatically close. How can i solve this problem???
Try a hard reset.
Hold the top or side power/sleep button and the home button at the same time until the Apple logo appears, then release.
You might also try accessing contacts through the phone app, rather than the contacts app.