This forum is dedicated to discussions pertaining specifically to the Motorola ASTRO line of radios (those that use VSELP/IMBE/AMBE), including using digital modulation, digital programming, FlashPort upgrades, etc. If you have general questions please use the General or Programming forums.
I think Rof is looking for the matching version for that particular release point (features). I know the latest XTS5000 released firmware is R4.00.00/R4.00.00