A study by the Consumer Intelligence Research Partners (CIRP) suggests that something between 300,000 and 400,000 current T-Mobile customers would have left the company for other providers had it not finally reached a deal with Apple to carry the iPhone. In addition, a poll taken just before the iPhone arrived on the US's fourth-largest carrier indicated that up to one quarter of all T-Mobile customers planned to get an iPhone as their next phone, suggesting that there would have been an even larger migration had the deal not happened.
