Sony's smallest additions to its smartphone roster won't launch until late August, but that didn't stop us dabbling with both handsets at Carphone Warehouse's Christmas (already?) show in London earlier today. The point of interest here is Ice Cream Sandwich, which arrives ready-to-go on both devices. The Xperia tipo will be arriving in Europe in its single SIM guise, with the dual-slot brother launching in Asia. It feels unerringly light in the hands at 3.5 ounces, while the 3.2-inch 480 x 320 TFT screen and 800MHz processor just about suffices for web browsing. There's a 3.2-megapixel camera on