Momo mobile phone verification code can't be received. What should I do if the operation is too frequent?

If the verification code is frequent, it can be lifted in half a month. Generally, if the time is released, you can make your own decisions.

SMS verification code is a SMS verification code that is automatically issued by the system when you register with your mobile phone number or handle some business. Generally, a mobile phone can receive short messages normally. However, there is a great risk of personal information disclosure. It may be because the port number transfer has not been realized, and most operators offer much better benefits to new users than old users, so it has become a common behavior to change mobile phone numbers frequently.

SMS verification can prevent malicious password cracking, ticket brushing and forum flooding, and effectively prevent hackers from constantly trying to log in to specific registered users and use specific programs to violently crack. In fact, using verification code is a popular way for many websites now.

Common verification code:

(1) Four-digit numbers and letters, both of which may be letters or numbers, are random four-digit strings, the most primitive verification code, and the verification effect is almost zero. Users of CSDN website log in in GIF format, which is a commonly used random digital picture verification code. The characters in the picture are quite satisfactory, and the verification effect is better than the last one.

(2) Chinese characters are the latest verification codes registered at present, which are randomly generated and difficult to type, such as QQ complaint page.

(3) The application of 3)MS hotmail is BMP format, with random number+random capitalized English letters+random interference pixels+random position.

(4) Korean or Japanese. It is difficult to register MS to play Korean on HF now.

(5) Google's Gmail is registered in JPG format, with random English letters+random color+random location+random length.

(6) Other forums are in XBM format with arbitrary content.

(7) Advertising verification code: Just enter part of the content in the advertisement, which is characterized by bringing extra income to the website and refreshing users.

(8) Question verification code: The question verification code is mainly filled in the form of question and answer. Its view is easier to identify and input than modular verification code, and the system can generate such things as "1+2=?" Let users answer questions, of course, such questions are randomly generated.

Another kind of question verification code is a text-based question verification code, such as generating the question "What is the full name of China?" Of course, some websites will also give prompt answers or direct answers after the questions.