Wait 2-3 minutes
Sometimes the code is not received immediately. Possible reasons: bad connection, peculiarities of the operator.
Check incoming SMS messages
Perhaps you did not notice the notification or it is not displayed on the screen.
Clear incoming SMS messages and try again
If your phone has run out of space for SMS messages, you may have problems receiving them. Delete some or all of the old SMS and try again.
Restart your phone and try again
This will reconnect to the network and may solve other problems that may be preventing you from receiving SMS messages
Uninstall the app, reinstall it and try again
This may help to get rid of unexpected errors
If the code is incorrect
Keep in mind that if you requested the code repeatedly, only the last sent code will be active.