Are you saying in IOS 7 you can block calls? This is my #1 reason to jailbreak. You wouldn't believe how many calls per day I get on my cell phone while at work asking me to switch electricity suppliers. It's ridiculous. With iBlacklist I got my phone back.
If I have this functionality in IOS7 then I can't wait to try it!
Yep, it works. What it's really doing however is just sending the calls directly to voicemail. If someone leaves a message, you do NOT get the visual voicemail but it still sits in your voicemail box if you care to retrieve using the phone number. I tried it today and it works great. It also blocks text messages.