I think if your cables are sheilded this will help if not totally eliminate the noise. the electromagnetic energy will "ground itself out" in the sheild of your cables.
There is not alot of power being transmitted from the antenna of most cellular handsets, so keeping it a reasonable distance away from your gear will help.
Active cables might be more liable to create the noise since there is less of a resistive layer between the conductors and the sheild, if there is a sheild at all. the greater the resistive distance between the conductor and the sheild, the more isolation from interference the signal will have.