Stick That Cell Phone

my job requires that have a cell phone with me at all times. but like many people, being a gadget hound i also have a laptop, an mp3 player and a pda. sometimes it's inconvenient to carry more than one device.

my idea is to 1) contain the core functions of a cell phone within a device approximately the size and configuration of keychain usb memory drives. it would contain the antenna and transmitting and receiving hardware.

it would plug via usb into any another device with sound/mic capability. it would utilize the battery of the attached device. it would contain memory for contact lists. it would contain drivers and software to run on other devices. ideally it would be portable enough to keep on your keychain.

part 2): the first device, (not yet in existence) would be the "shell" of a cell phone, just like any existing cell phone with a speaker, a mic, the dial pad, screen, battery etc. to make it functional, you would insert the cell phone stick described above into it. these shells could be thought of as "skins" for the cell phone stick. you could own several from different manufacturers, but the actual phone functions and account are contained within the cell phone stick and could be swapped from one skin to another.

part 3): in addition to using the cell phone stick in the above device, you could detach it from that, and plug it in via usb to any usb enabled device with sound/mic capabilities like a pda, laptop or mp3 player. when plugged into a pda, laptop or mp3 player, a software interface would be used to make cell calls from that device. so on a pda, you would plug in the cell phone stick and access the dial pad, screen, contact list etc. from the pda's screen and make your call.

you would not need to own a cell phone shell. if you only wanted to use the cell phone stick in the pda, mp3 player etc. you could.

i hope i have explained this well. i reworked it from a previous idea that i had, so thanks to all who fishboned the first time around. hopefully this is better.