So, how much does not carrying the iPhone hurt a service like T-Mobile? Quite a bit, apparently. According to a rather candid T-Mobile CEO Phillip Humm, ten percent of the two percent who leave T-Mobile every month are jumping ship to get their hands on a shiny new iPhone.Sure ten percent of two percent doesn’t seem like a huge number, but that certainly adds up–particularly if the carrier doesn’t plan to join Verizon and AT&T on the list of iPhone-friendly carriers. And from what Humm says, it doesn’t sound like T-Mobile plans to do so any time soon.You see, the reason why Humm mentioned this interesting statistic during an investor call is to highlight the carrier’s plan to get and keep more subscribers: cheap Android phones. T-Mobile will apparently be launching a number of Google-friendly phones that will run less than $100, with data plans under $10.So, what do you think? In the wake of another iPhone snub, can T-Mobile reinvent itself as the budget carrier?