The one I used quite often on laptops and phone:
--> Data transfers especially that thing called bluetooth tethering.
Note: I do not like free WLAN access on public places e.g. Sutarbakusu.
Makes sense guanyu210379, perhaps using your phone for data is more secure, but wouldn't tethering of USB be even more secure or is that to much of a hassle when you're out and about?
Pretty much there is not a lot of difference in what you can do with the connection between a bluetooth connection and USB connections. The bluetooth is just a LOT slower.
Mostly it is used when a USB connection or other cable connection is not convenient. The most common phone use you see is wireless headset and to connect to the cars electronic.
Bluetooth on computers is mostly used for wireless keyboards and mouse.
Sometimes just because you can do something does not mean there really is a reason to do it.