[veblen64]

Some BT GPS receivers have data-logging capabilities. That is, they will record data within themselves and you can later transfer the data to a computer or other processing device to track where the GPS receiver has been. So yes, in a non-real-time sense, some models can be used as standalone tracking devices. The m1200 does not have this onboard data logging capability, however.

Personally, I'm keeping my BT GPS receiver, for reasons others have stated here. If you're sure you don't need the m1200 anymore, you might enjoy giving it to a friend who has a BT-capable phone but has never been turned on to the wonders of GPS. They'll be blown away. ... Only caveat there is you might get yourself on the hook as a pro bono support tech.