I got some SMS spam (and later MMS spam) phoned t-mobile and asked them to help me stop it, since it costs me everytime I receive one. they offered to change my phone number, I explained, this was untargeted spam, that wouldn't help anything and would be a horrible pain for me. They offered to shut off my SMS service... um... no. eventually she gave me a number to report the spam with, but no credit, no indication that they or I could do anything. Really, I don't blame t-mobile that much. I'm with them because they're cheap and SMS isn't designed for spam. Really, you should pay when you send, not when you receive. It's horribly overpriced too, because it's grandfathered and hopefully, someday, I can go pay as you go email and stop using it.