TerreStar Genus hybrid satellite phone for AT&T with Windows Mobile is selling for $799
Naturally, its $799 price point will surely be considered as a premium when you take into consideration that it relies on AT&T's GSM/HSPA network while reverting to a satellite connection when AT&T's presence is missing or lost. In addition, the pricing structure for service isn't going to be cheap in any way, especially when you'll have to pay as additional $25 per month for the handset – which looks to provide you 65 cents per minute, 40 cents per text, and a hefty $5 per megabyte of data.
Granted, the handset will receive regular and satellite calls all on the same number, but it appears as though the satellite connection is only enabled as long as you're near and around the US, Puerto Rico, US Virgin Islands, and the surrounding oceans. Unfortunately, you're going to be out of luck if you travel abroad.