Demand for a next-generation iPhone has reached "unprecedented" levels, claims RBC analyst Mike Abramsky, citing survey results produced by RBC in tandem with ChangeWave. 2,200 people were polled between August 2nd and the 10th; within that group, 31 percent said they were likely to buy a next-gen iPhone. By contrast, an equivalent poll in June 2010 had only 25 percent showing interest in the iPhone 4.