What is the reason why the SMS gateway is abnormal when clicking wifi to get the verification code for free?

1, non-Chinese mainland mobile phone number.

2, mobile phone security software interception, for smart phone users who have installed security software. Solution: Open the mobile phone security software, temporarily turn off the interception function, and then try to get the verification code again.

3. The SMS gateway is congested or abnormal.

People around you can use it normally, but they can't receive it all the time, which may be the reason of the mobile phone itself. It is recommended to change the mobile phone card to someone else's mobile phone and try again. The above four points are the reasons why the SMS network is abnormal when wifi gets the verification code online for free.