To verify your phone number, go to My Profile and select "Phone Verification" from the completeness bar. This can be found on the right-hand side of the page (desktop) or by scrolling to the bottom of your profile (mobile).
From there you will see your phone number listed and will be provided with a 6-digit code. Click the "Call Right Now" button and enter the code using the dial pad on your phone when prompted.
Once you've completed this process, your phone number will be verified. You will now be able to send and receive calls properly through Telesafe.