What happened when the mobile phone received so many verification codes in an instant?

According to the information you provided, there are generally two possibilities:

1. Your mobile phone has a Trojan horse, leaving a back door for hackers. After registering with your mobile phone number, the other party obtains the verification code through the backdoor program.

2. Someone played a prank on you and deliberately registered different websites with your number.

It is suggested that you delete these short messages, at the same time, use mobile phone antivirus software to kill viruses, or restore factory settings, so as to avoid trojans in mobile phones leaking these short messages and causing unnecessary losses.