Japan’s consumers often get first crack at hot new smartphone designs. That’s not entirely the case this time around for customers of cellular giant KDDI, however, but they’re still getting some red-hot handsets to choose from. KDDI is offering up a spate of new Android 2.3 devices, including some heavy hitters: the Motorola Droid Razr, Samsung Galaxy S2 WiMAX, and the Sony Xperia acro HD.You’ve read about the Razr here before. The resurrected Motorola poster boy has brought some serious name recognition to its Android line-up, and its super-slim profile and powerful hardware make for an attractive package. The Razr’s 7.1mm thick chassis (which flares to 10.1mm at its 8MP camera hump) conceals a dual-core TI OMAP 4430 processor clocked at 1.2GHz, and 16GB of internal storage. Motorola has augmented the default Android experience with its Smart Actions functionality.The Galaxy S2 WiMAX improves on the original in several ways. For starters, the display has been expanded to 4.7 inches and ups the resolution to 720×1280 pixels — versus a 4.3-inch 480×800 display on the S2. The S2 WiMAX has also received a processor upgrade from the 1.2GHz Exynos to a 1.4GHz model, and the battery has had its capacity increased from 1650mAh to 1850mAh. WiMAX (of course) and NFC support are also built in.As for the Xperia acro HD, it’s another slim, sexy phone from the now Ericsson-free mobile arm of Sony. The acro HD looks pretty similar to the Xperia Ion, though its 4.3-inch display matches up with the one on the Xperia S. Like the Xperia Ion and Xperia S, the acro HD is launching with a dual-core 1.5GHz Qualcomm Snapdragon processor and offers 720×1280 resolution and NFC support. It also packs a capacious 1840mAh battery, and its 12mm, 149g body meets IPX5/IPX7 waterproofing standards.More at Tech-On!