Why is the verification of the same mobile number in each time when i add listing?

- The default solution
when verification my number in the listing page, and add new listing with same number, No verification is required again.
and

- Also when a user enters a phone number used into another account, a message appears stating that the number is used by another user and he must change the mobile number to another number


- Please show button to send verification code again !
Because some companies are late in sending the code or an error occurs in the Internet and does not reach the code to the user.
It appears after 30 seconds (I mean, show the user that he can request another code after 30 seconds and does not appear directly)

@galileopharma
Each phone number should be verified just once, you can see verification status in plugin settings.