The following apps will allow you to access your computer remotely. If you need a file or forgot to hit send on an email, these apps will solve that. They vary in price and functionality, but all accomplish the same task of teleporting your computer screen directly to your iPhone. All the apps work whether you are on wi-fi or 3G. Some use VNC servers so if you don’t have a Mac you will need to download a VNC server, such as TightVNC.