If you are logged into your account:
1) Select the My Account tab in the top left corner
3) Under User Details select to Edit your Mobile Phone
If you have not been able to log into your account:
1) Enter your Username or Mobile Number and click Continue
2) Enter Password and click Continue
3) Pick to Email a Code
4) Complete the Email verification process
5) Pick to Text a Code
6) Select "Don't have access to your Phone number?"
6) Enter your new mobile phone number in the field and press Continue.
Note: If you select X to enter your account you will bypass entering the new mobile phone number at this time but you must update the information in order to gain access in the future. See the steps above to update the mobile phone number once you are in your account.
*This is only available to accounts for returning users. Not available to newly registered accounts.