It may be caused by the following situations:
1. The mobile phone is equipped with interception software and cannot receive the verification code. I suggest you remove the SMS interception of the application software, or try to replace the 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 can't be received. It is recommended that you stop the phone due to arrears, and it will generally be restored within 24 hours after payment, basically within 24 hours. It is recommended that you change your mobile phone number or get it again the next day.
3. If the mobile phone is used abroad or cannot receive the SMS verification code, I suggest you try to get it again later if the signal network is delayed.
4. You can't receive the SMS verification code when the SMS storage right is full. I suggest you try to turn it off.