In an interview with AllThingsD, Nokia smartphone chief Jo Harlow explains that cutting exclusive deals for handsets with operators is necessary to get carriers to support the device – whether that's through handset subsidies, advertising or even providing an extra push from in-store sales reps—to get traction for a device in the very competitive U.S. smartphone market. The downside of that strategy is that there are lots of customers that are unable to purchase the device unless it's available from their operator. Article