Xiaomi can't receive the SMS verification code

The reasons why the mobile phone can't receive the verification code are as follows:

1, carrier server network delay, etc.

2, mobile phone arrears directly cut off the phone and SMS functions.

3. The storage of the mobile phone is full, and many text messages default to the saved mobile phone card.

4. There is something wrong with the number setting of the SMS center.

5. The positioning signal is poor, and the mobile phone can't receive the short message.

6. Set blacklist and information interception.