Aiding speculation that a 3G device is set for June is that according to Piper, stock of 2.5G iPhones has remained low in America for two weeks, in both its 8 and 16GB variants. On April 15th the company polled 22 Apple Stores, and found that 82 percent had a limited supply of the 8GB phone, while just 50 percent had any 16GB models for sale. Piper reasons that Apple is deliberately "trickling" a limited stockpile into the market, so that like Europe, it is not caught with a host of unmarketable products following the switch to 3G. Piper believes that the 3G iPhone will have a redesigned exterior, and a base price between $349 and $399.