Why does Telecom send these messages? Is it harassment?

I suggest you download a Tencent mobile phone housekeeper to intercept it.

Can intelligently intercept strange numbers, intelligently intercept all harassing calls and text messages. Will not intercept normal phone calls and text messages.

In addition, Tencent Mobile Manager's cloud killing, garbage cleaning, harassment interception and other functions are also very easy to use and thorough. Tencent mobile phone housekeeper has been certified by various authoritative organizations at home and abroad for many times, which shows that the function of Tencent mobile phone housekeeper is at the leading level in the world and users can use it with confidence. I hope I can help you and adopt it. Thank you.