Uses the 2.0 SerialPort namespace to connect to a mobile phone over a DUN (Dial up networking) connection (bluetooth or USB). I use a bluetooth connection.
Does AT commands against the phone to determine battery, signal, and ringer volume status. Also has a caller Id when the cell phone rings.
I wrote the application, because I usually turn my ring off when I am working but didn't want to miss any calls. With this applicattion running in the background I never miss a phone call.
Currently tested with a Motorola V710 phone. (I have performed seem edits on my phone, so I am not sure if all commands will work with a factory phone).
Also included PDFs from motorolas website that describes the AT commands and some other documentation on the hardware.