If you are updating your phone number and have previously unsubscribed from SMS notifications, you won't receive a verification code to verify your new number. You must resubscribe.
To resubscribe, please text "Start" to +1647-496-3967.
Once you have resubscribed to SMS notifications, please request a new verification code, and complete the verification steps.
See How do I verify my phone number for more help.
Note: verification codes will expire after 4 hours. If your code as expired, you need to request a new one.