If you are not a radio tech, I would advise you to take it to an ICOM dealer with programming capability and give them a list of frequencies you wish to have them program for you. The ICOM F-series radios are land mobile radios and yours could have been updated with later firmware and software which are not wideband capable. Also, since it has the suffix D on it's model number it may have P25 capability. If it doesn't have the hardware in it for P25 and you attempt to program it for P25 you could end up with a "brick". I've seen it happen. If you only want to use it as a UHF scanner (that's what a 2721 is, UHF), or add ham frequencies, you need the older s/w in it to do wideband as well as narrowband. Tell us what you are trying to accomplish and maybe we can give you some more ideas. We need more "givens" to solve the problem; even if we ultimately recommend what I did earlier, "take it to a dealer". Let us know.