There are a couple of ways to get to your MASC phone numbers to change them. You can tap on your active phone number at the top of the Hub, Then select the phone number that you would like to make active. From there you can also tap on Manage Profiles to edit them. Another way you can get to your phone numbers is to tap on the 3 bars in the upper left of the Hub, tap on Number Profiles, select your active phone number, or add and remove phone numbers.Tap here to see a short video on adjusting your Number Profile settings: https://youtu.be/OTdm2yT04dI