As a T-Mobile customer, this makes me pretty angry, but I also know that’s life these days. If you are also a T-Mobile customer, make sure you opt out and check the other settings. You can do so by following these steps:
Access the Privacy Dashboard at this URL - www.t-mobile.com/privacy-c… and adjust the following privacy settings (toggle off), per line:
You should be able to do similar on AT&T and Verizon, which I recommend you do.