What happened when the mobile phone received the SMS verification code?

Because the mobile phone number was leaked.

Mobile phones don't receive verification code messages from websites for no reason. Generally, because the mobile phone number is leaked and used by criminals, they bombard the mobile phone number with spam messages such as verification code in a short time. You can try to use third-party mobile phone housekeeper and other software to set up harassment interception to minimize harassing text messages.

Extended data:

Guard against "verification code attack":

1, the password is set a little more complicated, which makes it difficult for attackers. Attackers generally like to find users who are easy to crack.

2. All kinds of interference messages may have appeared on everyone's mobile phone. It is necessary to carefully identify the short messages and incoming calls of various "operators" and "banks" and handle them calmly.

3. If it is not the phone itself or the signal failure, please report the loss of the mobile phone card immediately, and freeze the third-party payment and bank account in time to prevent the attacker from impersonating the owner to steal the account when the user is in an "information island".

4. The operator will only tell you the verification code in one direction and won't let you send it again. Anyone who asks you for the verification code is a liar.