What's the matter with receiving a lot of text messages after receiving a phone call?

Group texting, phone book leakage, software vulnerabilities, etc.

1. Mass SMS: Some people will use SMS group software to send the same SMS to multiple contacts, mistaking it for one, and they will also receive many similar SMS messages.

2. Phone book leakage: Store the mobile phone number in a public place or an unsafe place, so that hackers can access this information and add it to the list of target users created or purchased by themselves for advertising.

3. Software vulnerabilities: Some applications have security vulnerabilities, which enable hackers to attack the victim's mobile phone through malicious code and send a lot of spam and/or messages.