Is there an app I can get for my iPhone to block callers that's free
If your iPhone is jailbroken you can The app is called iblacklist It's in cydiaI don't remember the source you need to add but I'm sure you can google it
Check with your wireless carrier (ATT). You may have a call-block feature as part of a package you already have.
Just go to settings>phone>caller Id and turn off show caller ID
Only if you're jailbroken