that white noise problem has plagued Magnum radios for a long time now (delta force, etc), I have no experience with any of the newer ones but as said I hope it is corrected
it will probably never be fixed in the magnum cpu controlled radios-alpha, delta, omega, 257. it is a problem inherent to THEIR chassis ground design due to the use of a microprocessor controlling frequency as opposed to normal phase locked loop design.