A survey by Piper Jaffray of iPhone 4 users was very telling. Namely, 77 percent of iPhone 4 users were upgrading from old iPhones, up from 56 percent in 2009 and 38 percent in 2008, showing brand loyalty.
However, only 16 percent of buyers were switching to AT&T from other carriers, which is down from 28 percent last year. Meanwhile, 28 percent of iPhone 4 buyers owned an iPad and another 39 percent said they would probably buy one within the next year, showing high brand loyalty.
Apple might sell as many as 2 million iPhone 4 units during its initial availability.
Source: San Francisco Gate {link no longer active}
