Why can't my telecom card receive the verification code SMS?

If you don't receive SMS verification code for a long time, it may be caused by the following reasons:

First, the number of acquisitions exceeded the limit.

Second, the mobile phone business does not support it.

Reason 3: Mobile phone security software interception (for smartphone users who have installed security software)

Reason 4: SMS gateway is congested or abnormal.

Reason 5: Mobile phones are used abroad or overseas mobile phones are used.

Reason 6: People around you can use it normally, but they can't receive it. If you encounter the page prompt "verification code error", I suggest you confirm whether the verification code is entered incorrectly. If you have obtained more than one verification code, please enter the last verification code you received.

SMS verification code:

An effective verification code system by sending verification codes to mobile phones. Both large websites, especially shopping websites, have the verification code function of SMS, which can ensure the safety of shopping more accurately and safely and verify the correctness of users. Some authentication code providers provide SMS authentication code service. Each website sends a request to the provider's server through the interface, and the server sends random numbers or letters to the mobile phone, and the provider's server verifies the authentication code uniformly.

Scope of use:

At present, the most commonly used banks are online banking, online shopping malls, group buying websites, ticketing companies and so on. SMS verification code uses SMS verification code to register members, which greatly reduces the data of illegal registration and bad registration.

Baidu Baike China Telecom