Samsung’s latest smartphone, the Epix, is now available from AT&T on an official basis. This new smartphone will feature a touch screen and most interestingly, it comes with a built-in optical mouse technology. Since touch screen technology is all the rage these days, Samsung has also taken the same route with the Epix, allowing for a much more intuitive navigation experience. This is also the first smartphone in the US that uses a built-in optical mouse that can be switched to a 4-way navigation key for a more traditional navigation experience, just in case you aren’t too interested in touch screen navigation. You have a choice of using either your finger or the built-in stylus for a more accurate selection.