CTIA Fall 2010
We already reviewed the Sanyo Zio on Cricket (where it goes by its Kyocera branding), but the Sprint version has been improved with Android 2.1 over the older Android 1.6 interface. The Sprint version also gets Sprint ID, obviously.
Otherwise, there are no significant changes to the Zio. It still uses a 3.5-inch display and a 3.2 megapixel camera around back. A trackball controls the action on screen if you want fine-tuned editing.