Demand for the iPhone has actually grown since the release of the iPhone 4S, a new ChangeWave Research study claims. The firm polled 4,413 people in March; of the people who said they would buy a smartphone in the next 90 days, 56 percent said they were planning to buy an iPhone. That figure is actually up two points from December, which not only represented part of the holiday shopping season, but came just two months after the launch of the 4S.
