AJ is absolutely correct. Clear 3G was always Sprint EVDO roaming. They never referred to their Expedience service as 3G. It just had the Clearwire brand. AS far as I know, there was never multi-technology devices ever created for Clearwire Expedience. I believe all Clearwire Expedience devices operated on the Expedience network only.
Prior to WiMax, the Expedience network was pretty large, covering approximately 75 markets in America (including Alaska & Hawaii). However, most of it was converted to WiMax. The only remaining Expedience markets still operating Scott listed above.
Robert