Tap and Hold the contact's number you want and select "Set as primary number" in the pop-up menu. The word "Primary" will show up to the right of that number after you set it as primary. This also works for email addresses.
Tap and Hold the contact's number you want and select "Set as primary number" in the pop-up menu. The word "Primary" will show up to the right of that number after you set it as primary. This also works for email addresses.
Thanks! Not only did it put a check mark, it actually reversed the positions. I was afraid that it would just write primary or default beside the number I wanted to be the main one. However, reversing the order is perfect.