Step 1 Connect the first phone first.
Step 2 Press and hold the MFB for 3 seconds to enter pairing mode.
Step 3 Turn on Bluetooth on the second phone and connect with the CK11.
Step 4 Reboot the CK11 by turning it off then on again. Both phones will now be connected to the CK11. If not, you can manually click "Avantree CK11" on your phone to connect.