This article explains how you can add/ update the mobile number on your user profile. It is vital that you keep your mobile number up to date, to ensure that you receive verification codes for 2FA (Two-Factor Authentication).
1. Navigate to the bottom of the side menu and click on your name:
2. Click the Profile link:
3. Then click on the Mobile Number field and enter the new phone number:
4. Click Save in the bottom right of the screen to save your changes.