Research In Motion has introduced the BlackBerry Dev Alpha C, a smartphone developers can use to test their applications and get ready for the launch of the BlackBerry 10 QWERTY device next year. The company also said developers will be able to trade their Alpha devices for a fully functional limited edition BlackBerry 10 smartphone. Step-by-step, RIM is getting developers ready for the Jan. 30 launch of BlackBerry 10, when the company will introduce one all-touch smartphone and one more traditional model with a QWERTY keyboard.