In my case it was Samsung J1 phone, and i was able to hear ringtones from 3rd party apps like viber, imo, but system ringtones were not working. whenever i tried to change ringtone phone taken me to some file manager, which i have no idea from where came in my phone. you can see in image what problem i was facing.Ringtone Stuck on Silentwhenever i tried to change ringtone it took me to following screenRingtone Stuck on SilentFinally i resolved it by resetting app preferences.you can find this option by going in settings> application manager > All> tap on menu button or 3 dots in corner and tap on reset preferences. as shown in image belowRingtone Stuck on SilentAfter than i was able to change ringtone/notifications.
