I tried the RL today and it is pretty cool. I only took about 5 seconds to connect (connects via Vision, doesn't use minutes). Once connected, there was a 1 to 2 second delay in voice transmission. The Sanyo 7200 is basically the 4900 in a different shell but with RL added. I was told that the 4900 could be upgraded to handle RL. I guess Sprint and Sanyo didn't go that route.