I do a lot of moves where I maintain 2400 IPX's, 2000 IPS's and 2400 IMX's. Is there anyway to swap 2 working phones in the 2400 IPX for say, a swap in office locations? These are remote locations with no IT support. I have been totally tearing down the phones and rebuilding them which takes a lot of time to reprogram all the keys/features. Even if I can't swap, a speedier suggestion would be appreciated.