htc diamond radio? bell
 

HTC diamond reception not so great on bell.
I want to try another radio rom but would need a backup to go back to. Current radio is version 1.04.02V. I was thinking about flashing the radio rom to something newer but am concernd that I cannot flash back to 1.04.02V which works now although not so great. Is anyone running a newer radio rom on bell in Ontario?
Any experts on this? Is there something that gives all the reception hence converage that 1.04.02 does but even more due to better reception?