Unlocking the Uniden UH710SX-NB / UH720SX-NB UHF CB for 80ch
1.Turn on the power by turning the power knob clockwise
2.Press the channel up button until it reads channel 39 and wait 3 seconds
3.Turn the power off by turning the power knob anti-clockwise and wait 4 seconds
4.While holding down the (TXP) & (SCAN) buttons, Turn the power knob clockwise to turn the power on
5.Check the channel range to see if channels 41 to 80 appear
6.If channels 41 to 80 fail to appear repeat steps 1-5
