The smartphone is king of the world these days, and how we interact with our phones is something that thousands of mobile marketers are constantly trying to understand. On this episode of the GeekWire podcast, we bring you two interviews from mobile marketing conference Postback, put on every year by Seattle company Tune. First, we speak with Tune CEO Peter Hamilton about the state of mobile marketing and how his background as an opera singer has helped him succeed in the startup world. Then we speak with the CMO of connected device company Belkin, Kieran Hannon, about the future of e-commerce and the smart home. Special thanks to Tune for sponsoring this episode of the GeekWire podcast.