Besides, just how many phones do you think are needed to even generate 1 GH/s?
I would say an iPhone 5 probably can do between 10-20MH/s, so if the got a million of those hooked up and mining, it would be about about 10-20 TH/s
That's a tall order though...
That assumes a million online at all times. Likely each of those will only be online for a few hours a day max. Anyone on an iPhone would need to run the app, it wouldn't run in the background for very long at all.
Yes, we're only expecting 4-6 hours per day from each unit (activates when plugged in, but after the battery has charged first). But we'll be getting way more than 20MH/s per unit when this new mobile silicon arrives.
Android-only for now, Apple doesn't allow any app that can download other executables, which is obviously what a distributed computing app does. BOINC (the software we use) is already coded for Android, too.