As far as I can tell, dialing from the "Speed Dial" cards only enables calling the recipient through Teams, not a different phone (mobile, work, etc.). Understand this can be done through the Contacts section, but having to go there defeats the purpose of the Speed Dial cards. Skype has similar functionality - when you click the "phone" button you have the choice of number/method.
As far as I can tell, dialing from the "Speed Dial" cards only enables calling the recipient through Teams, not a different phone (mobile, work, etc.). Understand this can be done through the Contacts section, but having to go there defeats the purpose of the Speed Dial cards. Skype has similar functionality - when you click the "phone" button you have the choice of number/method.