If you have bluetooth and want to use it on Archlinux you need to install the needed packages. Bluetooth on linux using Bluez protocol stackt.
On archlinux you need to install these packages:
$sudo pacman -S bluez blueman
If done, then enable the service.
$sudo systemctl enable bluetooth.service
$sudo systemctl restart bluetooth.service
Then make autostart application "blueman-applet" on your desktop environment or window manager that you use.
Here's blueman icon when the bluetooth is turning on.
To make your device discoverable, right click on icon, then choose make discoverable. And the devices will be discoverable for one minutes.
To setup devices. RIght click on icon, then setup a new devices.
And now you can use the devices for serial port or dialup networking (DUN)
To Send Files, right click on icon, then choose send file to devices. You will directly to devices, select the devices, then choose file to send. To browse devices right click on icon, then choose devices, then browse the devices. And for more you can explore it. :D
That's it enjoy.