Speaking with AllThingsD at yesterday’s Verizon iPhone press event, Apple’s senior vice president of Worldwide Product Marketing Phil Schiller made several comments about the development of the CDMA iPhone. “It was a lot of work,” Schiller said of the two-year process, which involved months of testing and more than 1,000 prototypes. Schiller also commented on the new model’s Personal Hotspot feature, saying, “A big part of it is the software, I’d say the biggest part. It uses the hardware in different ways.” Schiller also admitted that the feature would be a boon to Wi-Fi only iPad owners looking for a way to access the Internet away from traditional Wi-Fi, saying, “It’s a good way to do it.” Verizon will launch the CDMA iPhone on its network February 10.