Because I have 20 or so old mobile phones that are perfectly functional, though very outdated, I want to use them for something. I previously had an idea to extend the phone's camera wires so I could use it for a remote camera on a tether, but found no real way of doing such because they all use ribbon cables. Also, I was told voltage drop would cause it to malfunction. Now, my newer idea, for example, would be to mount a camera phone (we'll call it phone 1) to the rear window of my car and transmit the video via bluetooth to a phone mounted to my dash (and he will be phone 2) and allow the two phones to act as a rear mounted camera system. So basically phone 1 at the rear of the car would bluetooth transmit his video feed to the dash mounted phone 2 where I could just have to glance down in order to see better behind me. This video, plus mirrors should make it pretty easy to know what/who awaits my rear-ward travelling destruction! The phone I carry everyday is an Android phone, so maybe there is an application available for download to allow another phone to connect to it in this way? I have had no luck with searching for one, but I'm not sure if anyone else here happens to know of one. I don't need to record the video, I just want to view the video from another phone in real time. Also, I am aware backup cameras can be had for next to nothing, but I want to try and find a use for some of the old mobile phones I have. I prefer to recycle them for a cool project like this if possible. Thanks for reading!