First, you’ll need to download the app if you don’t already have it. Visit the Google Play store for Android phones and the App Store for Apple phones to get this free app.
iOS (Apple) Users
Android Users
Open the app.
Then, to update your cell phone number, click three buttons in the bottom right corner:
Select Settings
Select Contact Methods
Verify that the phone number(s) associated with your account are up-to-date. If you need to edit them, use the Edit button in the top right corner.