@H3I Good morning! Do you mind me asking where you're roaming? Dial Assist, as far as I'm aware, puts the international code in front of the number you're dialing but I'm not sure if it works very well outside of the EU. I don't have a great deal of knowledge on it but you can try to turn it off in your settings under "Dial Assist" Try that and then see if you can make an outgoing call. Any issues with incoming?
Okay cool, thanks for trying that Are you on a Prepay plan? If so, just make sure you have credit to make calls. How are you entering the number when you're making a call and have you tried a few numbers to test? Incoming working okay for you, have you tested that?