Well look what we have here. It's a working pre-production prototype of the BlackBerry Curve 9300. Branded with the name of T-Mobile U.K. and featuring the carrier's 3G frequencies under the hood, we could see this handset make it across the pond to the States for either T-Mobile or AT&T. The BlackBerry Curve 9300 takes over for the Curve 8500 and updates some of the older model's features. For example, instead of navigating with a trackball that eventually wears down and needs to be replaced, the newer 'Berry uses an optical trackpad which is not only more precise, but also has no moving parts that can wear down. Another design change has the buttons on the newer phone flush with the body. One thing that didn't change-at least not on this prototype-is the use of BlackBerry OS 5. Some had speculated that the 9300 would debut OS 6, but it would appear that RIM wasn't ready to release a handset with mind-blowing changes just yet. All this does is make those BlackBerry fans pining for the Bold 9800 a little more impatient.