Get a high amp small (like motorcycle) battery and Voltage inverter to have 12v and 100 (for a laptop that will run Vista or 7 (you need that to have a browser that will utilize web sockets for a seriously sick robot) the OS and allow you to use a USB camera to stream the video and sound from the remote robot w/windows media, live messenger etc..or get a web enabled (remote viewing capable) security camera. Get yourself a USB dongle type device (I use a clear hotspot)for Internet connectivity. Using any USB enabled micro controller (i have had great success with the Parallax Stamp ***1 about $150 each) you can set up a dot.NET websocket HTML5, http, etc connection to another comp that has IIS with ASP.net app to take command posts from a web page using ANY device. Allow access to your webserver comp at home, connect to the site with any device that has a browser. Have the page write the command file (which the robot laptop requests from the webserver as an XML file. Basically the web app has a page that accepts the postback like this EX: default.aspx?Direction=[L,R,F,B)&Distance={increment of distance your command app accepts as a valid value]&CameraMove=[L,R,U,D]&turn=[R,L]&turndegrees=[0-360} and so on and then returns a clean page to the remote system to enter the next command. The robot Laptop app can recieve the commands from websocket using a wifi, or gsm hotspot connection to a local or remote hosted IIS server if you choose. If you trail two necklace sized chains (insulated) you can park the robot on two seperated sheets of copper hooked to a battery charger and it will stay on as long as the wall outlet is hot and recharge while parked as long as it does not pull more than about 2 amps (hence the motorcycle battery). I do not think you really want to reverse engineer a cell phone to drive it. A. Not enough power. B. Impossible to solder the micro circuits. A cell phone that has the umbilical and O/S do this is now more expensive than the minimum laptop required and I do not know of any kits you can get to drive external items other than card readers. You can however use a cellphone to make the posts described in the next paragraph or use it for the Internet Hotspot connectivity bi-directional. It really depends on If you want to write and app for the microcontroller, the receiving phone, the sending phone -or- write an app on the laptop that controls the microdevice via usb and receives it's commands from a redily available webservice using any device that can post. If you can write