How can I verify my new phone number on my previous account? Whoscall Service Center September 10, 2020 07:05 Please re-install the Whoscall app, log in your account, and verify with your new number. Related articles How to transfer my subscription to my new phone? Why do I have to set up Whoscall as the "Default phone app"(Android 8,9) or "Default caller ID & spam app"(and above Android10)? How can I register Whoscall? Comments 0 comments Article is closed for comments.