Hello @Kbjazz!
I will be happy to help with your call blocking question!
You can actually block calls directly from the device itself! Check out our Device Support Center for specific instructions. After you choose your make and model, select Tutorials> Calling> Block calls.
We also offer Smart Limits which allows you to block numbers, or there are numerous of third party apps that can be used as well.
Let us know if you have any other questions! Have a fantastic day!
Demetria, AT&T Community Specialist