Hi, ciiru,
You will need to add a new phone number to your account; first, you will not be able to remove your one phone number from the account.
Once you have added the new number, then you can remove the old one. If you have difficulties with this, please call us.
Go to the 'Help & Contact' icon on the PayPal website, then click the 'Contact Us' link at the bottom of the page. From here, if you click the 'Password and Account Access' option, then 'Login Problems'. On the next page, you will see a 'Call Us' option. You do not need to be logged in to use this feature.
-Tommy
