Qq can't receive the verification code by changing the mobile phone number.

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

1, the mobile phone is in arrears. The mobile phone can't receive the verification code, probably because the mobile phone is in arrears, which makes it impossible to send and receive short messages normally.

3. Poor network environment. It is best not to verify in the place with poor signal, which will not only delay the reception of verification code or fail to receive verification code, but also lead to the decline of mobile phone power.