To change the phone number saved on your BET99 profile, you will first need to sign into your account and head to your account profile settings by clicking on the icon located beside the "Deposit" button.
Under "My Account", select "Personal Details".
Within the Person Details screen, you will be able to update your phone number. Make sure to click "Save & Update" to save the change.
If for some reason you are unable to update your phone number, please reach out to customer support.