Business 2.0 : As phones become increasingly complex, the industry must make them easier to use, says Pertti Korhonen, chief technology officer for Nokia (NOK). I sat down with Korhonen this week to sound him out on the industry and its future. He also talked about iPod and how it has established a benchmark for mobile music devices. “Apple has set the benchmark, and we have to not only meet but exceed that. Nokia is working on it, but you have to also take into account the mobile platforms. In the end, for mobile music to take off, the cost of service and the user interface are going to be key. It is an opportunity for us to use the UI to create a unique mobile experience.” Here are some excerpts from that interview.