You add your favorite items to the carousel, which is a row of tiles along the bottom of your phone's home screen. The carousel can hold up to 15 tiles, which you can add, remove and rearrange to suit your needs. Highlight a tile to reveal its menu on your home screen. Add up to 8 "bubbles" -- at-a-glance items that display on your home screen, like the weather or your daily horoscope. Browse and download new tiles from your phone's "Personalize Home Screen" tile. New tiles are available every two weeks. Press your navigation left or right key to select a tile; up or down to select a bubble or menu item. The "Home" tile always stays put, so you can easily get back to your default display.Follow that? Actually, it's a lot easier to use than to read about. The interface is clean and easy to master. Kudos to Sprint for trying to reinvent the cell-phone navigation experience. Once you know how to deal with any one of these new phones, you also know how to work the other two. Hopefully Sprint will extend this feature to most of its other phones. The majority of cell-phone buyers who get regular cell phones (not Apple ( AAPL), Palm ( PALM), Google ( GOOG), Research in Motion's Blackberry ( RIMM) or Microsoft-OS ( MSFT) smartphones) and base their purchases on low prices and the most important features should make sure that check out these three new designs.