"While Google has been quick to iterate Android, the carriers have been slow to roll those updates out to many customers...
'Microsoft will push Windows Phone 7 software updates to end users and all Windows Phone 7 devices will be eligible for updates,' the company tells Bott. Their very direct phrasing almost makes it sound as if they’re very aware of fragmentation issue on Android and what a headache it is for consumers. In fact, I’m sure they are."