What's with the collection phone and the constant texting?

Maybe a friend borrowed money overdue, and the number was used by someone else before.

1. Probably because my frequent friends applied for some illegal online loans. Such online loans read friends' address books and call records. Friend loans overdue, if the other party can't get in touch with anyone, he will get through the message.

2. It is also possible that this mobile phone number was used by others to apply for online loans before, and then no one used it. Finally, this number fell into my own hands. As long as the borrower does not pay back the money, the collection will generally keep harassing calls and sending harassing text messages.