This is a totally wierd question. Phones have USB ports. Some phones such as Android based allow applications to be developed for the phone. Installing those applications for the average consumer will probably be tricky though.
So if I'm reading you right, you would say have an app on the Android based phone and connect it to something via it's USB port.
Someone makes a plug in IRDA device for the iphone.
Some phones like the Motorola V3, V3xx allow access to the GPRS modem through the USB connector which responds to AT commands. I have played with this mechanism successfully.