If you have the newest version of the Rebellion app, you can change your phone number by entering your account PERSONAL DATA> PHONE NUMBER.
There you must click on the pencil and edit it. Keep in mind that an SMS will be sent to the new number so you can verify it.
If you need help, don't hesitate to contact us.
IMPORTANT: Do not attempt to re-register for Rebellion with the new phone number, as this may complicate the process of changing the phone number associated with your Rebellion account.