Apple mobile phone can't receive verification code SMS. What happened?

This may be caused by the following circumstances:

1. Interception software is installed in the mobile phone, and the verification code cannot be received. I suggest you unseal the SMS of the application software or try to change your mobile phone.

2. The mobile phone is turned off, there is no signal for the time being, the payment is overdue, or the verification code and SMS are not received. It is recommended that you stop working due to arrears, and will generally resume within 24 hours after payment, basically within 24 hours. I suggest you change your mobile phone number or pick it up the next day.

3. If you use your mobile phone abroad or you can't receive the SMS verification code by using your mobile phone abroad, it is recommended that you try to get it later in the case of signal network delay.

4. If the SMS storage authority is full, you can't receive the SMS verification code. I suggest you try to open and close it.