Question: how to change your phone number on paypal without logging in?
Answer: First of all, log in to your PayPal account. ... 
Go to Settings. ... 
Click on Update choice in order to edit the existing information. ... 
Enter the new phone number if you have PayPal phone number changed in the field provided. ... 
Click on update number. ... 
In case, you want to assign a brand-new number, then click on “+” icon.