First, we want to reset the headset:. For MB660 : MB660 Reset: 1. Switch the Headset OFF. To do this, turn the earphones outward (so the headset is flat and can go back in its case) to turn if OFF. It will say “Power Off.” 2. Press the Sound Effect Mode button for 4 seconds. This is the bottom button on the right side of the headset. (the inside of the headband will have R for right and L for left) Please note, after holding the button down for 4 seconds it will not give us any light or say anything. To see if the reset worked we can try pairing the headset to the phone again. For MBPRO2/1 UC MB Pro1/2 Factory Reset: *Please note this reset should be performed when the headset is NOT plugged into the charging cable or on the charging stand.* 1) Turn the headset off. 2) Press and hold the multi function button until the LED flashes RED & BLUE (ie: Pairing Mode). 3) Simultaneously press and hold the multi function button and the audio button (volume control button-press the button to mu…