Another number used by OPPO mobile phone before has been changed to another number, but I can't receive the verification code information and express delivery information. What happened?

What if I can't receive the SMS verification code? Drop the chain at the critical moment and never promise. If the functions of harassment interception, blacklist and information interception are not enabled on the mobile phone, and the number portability service is not handled, it is recommended that you try to change your mobile phone and card. If it is determined that it is a mobile phone card problem, it is recommended that you contact the operator to handle it. If there is a problem with your mobile phone, it is recommended that you bring the relevant purchase voucher to the nearest OPPO customer service center for testing.

This answer applies to all OPPO models.