I doubt if you can mod a trunked radio to work on another band unless you are good at programming and can write new software for it and upload it and make it work or build a computer interface then write a computer program to make it work. Have you looked carefully at the radio? They don't even have any user controls and are completely useless for anything but trunked service. You'd be better off to get rid of them and buy a radio for the band you want. BTW, there are 6 on ebay for $49 if you want some more, item 3072280204. :-)