On the “Your Account” page, choose “Login & Security.”
On the “Login & Security” page, next to “Mobile Phone Number,” select “Edit.”
You’ll land on a “Change Mobile Number” page. Here, beneath “Mobile Number,” click the drop-down menu and choose your phone’s country code. Then, in the given text box, type your new phone number.
Continue the process by clicking “Continue.”
In the prompt that opens, choose “OK.”
At the top of the page, select “Your Account.”
From the “Account Settings” section, choose “Login & Security.” If you’re asked to enter your account password, do so.
On the “Login & Security” page, next to “Mobile Phone Number,” tap “Edit.”
You’ll see a “Change Mobile Number” page. Here, tap the drop-down menu and choose your phone’s country code. Then tap the text box and enter your new phone number.
When you’re done, tap “Continue.”
Select “OK” in the prompt.