What's a good iPhone app to make phone calls?

I need directions on how to block a specific cell phone number from calling my cell phone.

I probably cant get any call either. My phone is hooked up though the internet if that matters.

How to trace 'private incoming cell calls' that have blocked their id

How do I block a cell phone number from calling me on my cell phone

You get a phone call and caller ID says the number calling you is 000-012-3456, first should you answer the phone? Who is cal...

My g/f is looking at some of the Alcatel smart phones running one of the Android OS's, but I have never heard of that brand b...

See, with my plan I have 400 day time minutes and then unlimited after 5pm and weekends. I'm looking for an app that will le...

Can apps made with the iPhone sdk run on non-jailbreaked iphone's?

I want to know what a good cell phone if.one with good pictures,good volume,works in most of USA

trace a phone number from my cell bill that is to a number in mexico