Monthly price will be based on usage
Extra large battery in the Maxx offers 21 hours of talk time
Some say Hein's task faces roadblocks due to continued problems in PlayBook 2 and BlackBerry touchscreens
Plan starts Sunday for new smartphone, tablet customers, $30 unlimited data plan stays in effect for current clients
Lumia 900 by Nokia is first sign of Windows Phone's promise
Total hits 195 markets, well ahead of other carriers
Update gives U.S. users faster browsing and useful Data Manager tool, among other features
But Droid Razr at 32Gb still on sale for $300
