There is a lot of Fake Calling apps in app store, some not as good as others. The one i used to love was GottaGo but now i like this new one Fake Caller from Hot Potato. Its $0.99 from app store. and it has more features! like when you push End Call it actually says End Call where the timer is. then when you hit End Call it takes you right back to your Home Screen! Well for only 99 cents i like it! The iTunes link is HERE