Call Me number not saved when inputted in RC app on mobile

When connecting to the meeting audio using the Call Me feature on the RC app on mobile (both iPhone and Android), after typing in the number, the next time the user connects to meeting audio via Call Me feature, the user will need to type in the number once more.

There should instead be a way or a box that users can check to save the number for next time, so that users don't have to type their number.