For everyone here that has friends and family with tmobile. As of april 5th tmobile is rolling out a spam blocker. For two days so far it is working
Tmobile instructions. I know it works postpaid. Not sure prepaid working yet. It new. You try and it will give you a message on working message.
Presidential Obama made a mandate all carriers must have spam block for free
To turn on or off follow:
To check scam block on or off
You must push the green call button after you enter code. As if you were making a call.http://www.droid-life.com/2017/03/24/t-mobile-scam-block/amp/https://explore.t-mobile.com/callprotection
Hope this helps.