Why can't I get the verification code when I change my card?

The mobile phone can not receive the verification code, which may be caused by the interception of the mobile phone. Take oppo R9 plus mobile phone as an example, the solution is as follows:

1. First, we click the Settings button on the phone desktop. ?

2. Then click the information option inside. ?

3. After that, you can see the button behind the verification code security protection. Click to close this function, and you can generally receive the verification code.

4. In addition, you can click the harassment interception option inside. ?

5. Then turn off the interception function inside to see if the verification code is intercepted, and then cancel the interception to receive the verification code.