If it is a verification code, it is recommended to change to another location and try to resend and receive it to rule out whether it is caused by network reasons.

Check whether the latest third-party software (security guard, system management) has been downloaded on your phone. It is possible that the software has intercepted text messages. It is recommended that you try to uninstall it. Verify whether the SMS blacklist function is set up in the mobile phone. Information, more, settings, intercepted information, blacklist, whitelist, intercepted SMS, intercepted information view (different models of mobile phones may operate slightly differently).

The term verification code was first proposed in 2002 by Louis Von Ahn, Manuel Blum, Nicholas J Hopper of Carnegie Mellon University and John Langford of IBM. Carnegie Mellon University attempted to apply for the word to become a registered trademark, but the application was denied on April 21, 2008. A commonly used CAPTCHA test is to ask the user to input text or numbers displayed on a distorted picture. The distortion is to avoid being lost by computer programs such as optical character recognition (OCROpticalCharacterRecognition). Effect. Because this test involves computers testing humans, rather than humans testing computers as in the standard Turing test, people sometimes call CAPTCHA a reverse Turing test.