adding channels

Hello all! I need some help. I'm trying to find my way around this radio, and to be honest, I believe I have managed to erase all the channels that a friend programmed in for me by trying to add a frequency as a channel manually. Anyway, I am no longer able to switch back and forth between...

Hello All, I al new to the forum here, and hopefully im posting in the right topic area. (I know it’s annoying if its not). I was wondering if anyone knew how easy it would be if possible to make a 4 Channel HT750 flashed/converted to a 16 Channel? Or is it possible to be able to add zones like...