Recently I've changed the ringtone for text messages for some of my contacts. The new ringtone has a playtime of 11 seconds. However, when I receive text messages, the ringtone stops playing after ~5 seconds (I think it stops, when the phone screen turns black again).
Is it somehow possible to get longer ringtones working? Or is it (for testing purposes) possible to set the time, a notification is shown by default?