and andoid is blossoming an verizons network and iphone is suffering through at&t.
There is a market outside the US. Worldwide the iPhone is now availabe unlocked in almost all countries. Even in Germany T-Mobile lost the exclusive deal now.
Having the iPhone on Verizon might help Apple to sell maybe 2-5 million more. That's still less than Android and Android has much faster growing rate. I expect Google to activate around 30 million phones in the holiday quarter while the iPhone normally only has a strong third quarter (when the new iPhone gets released) but much weaker holiday quarter. And Android phones are actually available in less countries than the iPhone currently (especially in South America)...
Last year they slipped from 18% marketshare in Q3 to only 16% in Q4. Currently they are again at around 15-16% while Gartner expects Apple to have only around 14% marketshare in 2014 and Android to have around 30-35%.