What if vk sends the verification code once and then exits?

If you don't know the solution, please consult the telecom operator directly.

You can receive the verification code by registering with the mobile app, sometimes you can't. To register with the computer, the system first calls. If the call is normal, enter the last 4 digits of the incoming call number and click Send Verification Code to register successfully. If you don't get the call, wait two minutes and try to send the SMS verification code to see if you receive it.