The Mobile App is the simplest way to change your phone number.
It can be done in just a few short steps.
Log on and select the 'Profile and Settings' icon in the top-right corner.
Then, select 'Edit' next to your phone-numbers.
Tap and update the number you want to change, then, select 'continue'.
Check the number you have entered is correct, and select 'confirm'.
You'll then be asked to enter your password or confirm it’s you.
This may look different depending on your device and settings.
The changes will take place immediately.