I accidentally answered the "allow send premium sms" question in Samsung Messages app with "never allow", and now I can't send SMS to short codes. I can't find the setting to change it back to "always allow". It seems that before marshmallow update, it was in Settings -> Apps -> Messages -> permissions? or something like that? That clearly does not exist now under Settings -> Applications -> Application Manager -> Messages -> Permissions. Any ideas where this is?
Fyi, I've also tried resetting all app preferences to default, and that does not resolve this.