In a nutshell: The Sony Ericsson X10 Mini Pro has everything that the original X10 Mini has, plus a slide-out physical keyboard. It's an ultra-compact smartphone running Google's Android OS, with a 5 megapixel camera with autofocus and flash, aGPS with Google Maps, a fast processor and support for 16GB of memory. Connectivity includes WiFi and HSPA. But the small screen size, poor battery life and old version of Android are a disappointment.