What is the reason why the second-hand Apple phone you just bought will receive a lot of transfer information and loan text messages?

1. Personal information was leaked, resulting in frequent receipt of loan text messages.

Criminals use their identities. Criminals fraudulently use their identities to defraud sensitive information such as personal information and bank card numbers by sending short messages or telephone calls.

3. Infected by malware, the malware will be automatically downloaded to the mobile phone, resulting in receiving a large number of loan text messages.