Campus e-code verification code can not be received

1. Network problem: Please check whether your mobile phone network is normal, weak signal or unstable network. The reception of verification code requires a stable network environment.

2. Cell phone signal problem: Please check whether your cell phone signal is normal. If the signal is weak, it may affect the reception of the verification code.

3. Operator shielding: Some operators may classify SMS with verification code as spam messages for shielding. You can try to contact the operator and ask if there is such a situation.

4. SMS interception settings: Some mobile phone systems may have SMS interception function, which may misjudge the verification code SMS as spam SMS. You can check the phone settings to see if there is any relevant interception function and make adjustments.

5. Delay in sending verification code: During peak hours, SMS service providers may delay sending verification code. You can try to receive the verification code later.