I have the EX-V6 with no NAV. I wanted to sign up for XM before the price jump in April. I cannot get the radio to Channel 000. I can get to 001 which is the preview channel, but there is no way using the tune button to move off that channel once I'm there. Up/down does not work. I can move to another catagory and press the tune up/down and go from channel to channel, 150, 151, 152, but when it gets to the end of that catagory, it goes back, i.e. 150, 151, 152, 153, 150. It always says Catagory, is there a way NOT to be in a catagory and just tune each channel one at a time? The rep at XM radio was lost. I called the dealer and they jsut gave me the old "bring it in" but I have to b e missing something. When listening to the preview channel, it says to tune down one channel. Argh! I can't! I am in my trial period now, but I want to get the .99 rate before it goes to .99. Any clues?