It's not just the Grid 10 that Fusion Garage has to show: the company also has a new smartphone, the Grid 4, which runs the same Grid OS as the slate. Based on Android - so compatible with apps from the Amazon Appstore - the Grid 4 has a 4-inch WVGA display and a Qualcomm Snapdragon MSM8255 processor paired with 512MB of RAM. It's designed to integrate with the functionality of the Grid 10, with media pick-up between the two.
There's also a 5-megapixel camera with autofocus and an LED flash, capable of 720p HD video recording, along with a front-facing 0.3-megapixel camera. The 122.4 x 63.9 x 9.6 mm, 137g handset has 16GB of onboard storage, WiFi b/g/n, Bluetooth 2.1+EDR and triband HSPA.
GPS/A-GPS, an accelerometer, ambient light sensor and a digital compass, along with a microUSB port and a microSD card slot round out the main specs. An optional USB Host adapter will be offered too.
The Grid 4 will be sold as an unlocked device, priced at $399 unlocked and SIM-free, as well as through an operator as yet unspecified; given we saw the Grid 10 clear the FCC with AT&T 3G, we wouldn't be surprised if AT&T were looking at the Grid 4 too. It's expected to ship in Q4 2011, though you can pre-register for interest now.