One of the things I like about G* is that it not only has its separate market of the rural undeserved, but also virtually all of I*'s market. At least after a year or so after starting up.|
For one thing, G* phones will have longer battery life and better indoors reception (due to CDMA technology advantages), as well as being smaller. These are real attractions for execs. Even those who will ignore the much higher costs.
There are very few parts of the world were executives actually go, that G* will not eventually reach. Virtually nobody goes to latitudes higher than 70degrees (even the Alaskan north slope is covered. Barely.)
There will be an initial advantage for world coverage for I* however, related to how long it takes for G* to actually get ground stations up and running in places like Indonesia. G*'s service model requires a ground station for each area about 2/3 the size of the United States. (Fewer if the pop. densities are real low.)
I*'s model in theory requires only one working ground station in the world (though it will have many more), since if all is working perfectly I* can relay long distance calls around the globe by bouncing from one satellite to the next. G* requires a ground station be within the footprint of the same that is serving the mobile user. This requires about sixty worldwide, I believe. E.g., one for all of Western Europe, one for the Middle East, etc.
Hence, initially, I would expect that the exec who is heading to Southeast Asia, for example, is gonna be using I*. That could well change once G* ground stations are everywhere. And G* is gonna be immediately more attractive to China, for example.