Many unknown phone calls harassed before the end of the year. Do regular tattoo training schools make such calls?

Formal study will definitely not make harassing calls. This is probably some schools with miscellaneous brands.

You can intercept harassment through some harassment interception software, so you can't call in.

You can use the smart interception function of Tencent Mobile Manager.

To intelligently intercept these harassing calls, fraudulent calls, and harassing text messages.