When and if it arrives at T-Mobile, the HTC Sensation promises to be a big step up from the HTC Thunderbolt. And that's no small feat. The Sensation is expected to have one of the first dual-core 1.2-gigahertz Qualcomm ( QCOM) Snapdragon processors, which holds big promise for Qualcomm. The Sensation has a 4.3-inch display, a 8-megapixel camera and it runs on Android's Gingerbread operating system. The phone has an aluminum unibody structure, a trend Apple started with its laptops. The Sensation runs on the HSDPA network that AT&T and T-Mobile call 4G. The phone is expected to arrive as early as next month.