T-Mobile's scam protection comes in three different levels. The first level is called Scam ID. It will identify and alert you to any suspicious calls. It won't block them but it will let you know when they think there's something fishy about a call coming in. The 2nd level is flat out blocking suspicious calls, this is called Spam Block. The 3rd level identifies and names who is calling. It will let you see the name and the phone number that they are calling from. This premium service is $4/month unless you are on the T-Mobile One Plus plan in which case it's free.