Sprint today officially launched its dual mode iDEN / CDMA service and handsets today, though the phones have been on sale for a month now. These phones use Sprint’s CDMA network for standard phone calls and data and the iDEN network for all walkie-talkie type services. Instead of offering separate price plans for these hybrid phones, customers will be able to choose any Sprint plan and get free unlimited walkie talkie service with any plan over $40. However features like group walkie talkie and others will cost extra. Sprint has given each of the new phones names - the iC 402 is called Blend and the iC 502 is now called Buzz.