This sounds like a money grab business to me. They'll launch, make a couple hundred mil, then they'll get hit with fraud, a ton of people will lose money, and they'll be forced to shut down, since noone will want to use the service, in fear of getting defrauded. Since there is no barrier to entry, it'll be like 2 weeks before someone comes out with a black market version, that will look exactly the same, but instead…
What is the hole in this? I'm not saying there is no hole, and I did like your question (and upvoted it), but I'm wondering if you can think of a good attack that I'm missing.
Edit: Instead of "iPhone" I should have said just "phone" since it will be on multiple platforms.