Cellular phone carriers seem to be a little imbalanced when it comes to marketing. They over-indulge us with offers to switch, get better phones, go faster, be more hip and stylish.
But when it comes to something actually useful, you have to learn about it by Google‘ing it?
Register your received Spam SMS text messages that get sent to your phone with your local carrier by forwarding it to 7726 (SPAM, if you actually had letters on your phone number buttons)
Because of how SMS was implemented, it’s near impossible to block a specific Spam sender, but at least you can help raise visibility of where they are coming from (even though, the source addresses are probably being spoofed, as well.)