Is there a way to block private numbers from calling a wireless cell phone from AT&T? For example, my device is the LG Neon II (GW370), and I want to prevent private calls from calling me entirely. I know you can set the No Caller ID to silent, but it interferes with whatever I'm doing and it's annoying. I just don't want private calls to come in at all. I know you can do it on a landline, but can private calls be blocked from cell phones as well?