Kyocera Echo is first seen with HTC Arrive, which both would land with Sprint. Both Echo and "Arrive" seem to be presenting something that may be really new and different. Not yet clear in which part of the new things.
Kyocera Echo probably will carry Google Android 2.2 (froyo) as its OS, and HTC Arrive carrying WP7 as its OS. Second is the new OS, but not really new, because we've seen a lot of smartphones using both. It means something new is not the OS.
The new and different things may be in form and model of both devices. what form and model of Kyocera Echo will look like?, we certainly will make sure that after Sprint as well as Kyocera confirm and announced officially. Stay updated!.