1

I don't even know if this will work, but after having this problem intermittently on an ATT galaxy note 4 and not being able to find DTMF settings ANYWHERE, I found this: Settings> Device> Personalization> Accessibility> Dexterity and Interaction> Press and hold delay (options short, med, long).... On a T-Mobile galaxy note 4 it was similar but not exact: ...


Only top voted, non community-wiki answers of a minimum length are eligible