This is part one of a software-focused deep-dive on the HTC HD2, a Windows phone running Windows Mobile 6.5. The HTC HD2 has is powered by the Qualcomm Snapdragon processor, at an amazing 1024 Mhz. It has 512 MB of ROM, 448 MB of RAM, and a microSDHC card slot for expansion up to 32 GB. It weighs 5.54 ounces (157 grams), and measures 11mm thin (0.43"), 120.5mm tall (4.74"), and 67mm across (2.64"). It's a 3G phone, but this model is the Euro/Asia model so lacks the 3G bands for North America. It supports HSPA/WCDMA 900/2100 MHz and GSM 850/900/1800/1900 MHz. The HD2 has 802.11b/g WiFi, Bluetooth 2.1, and a 5-megapixel auto-focus camera with a dual-LED flash. It has a built-in GPS, G-sensor (accelerometer), proximity sensor, ambient light sensor, and a digital compass. Distributed by Tubemogul.