The follow-up to the Google sanctioned G1 smartphone is on the way and T-Mobile has released official details. The T-Mobile G2 gets Android 2.2, an 800 MHz Snapdragon MSM7230 CPU, applications like Google Voice Actions built-in and 4G speeds via the carrier's HSPA+ network2. The HTC-designed handset also includes a 3.7-inch multi-touch screen, an optical trackpad, a new hinge design for the full QWERTY keyboard and a 5-megapixel camera with 720p video capture.

HSPA+ support is built into the processor to achieve 4G speeds, with T-Mobile citing a theoretical peak capability of 14.4 Mbps on a network that currently "covers 100 million Americans in more than 55 major metropolitan areas."

What else? The integrated Voice Actions feature is worth noting (and as we reported earlier in the week, voice is really starting to go places), Android 2.2 brings seven customizable home screen panels and Flash support, there's 4GB of internal memory and support for up to 32 GB of external memory (with an 8GB micro SD card pre-installed), Swype text input, a 3.5mm headphone jack and the camera has an LED flash and autofocus.

There's no confirmation of a release date or pricing yet (the predictions are for a cost of US$200 on contract and $500 without) – T-Mobile says it will start taking pre-orders from existing customers later this month.