Dell’s Windows Phone 7 device “Dell Lightening” just got leaked to Engadget. Looks are really impressive, sleek and I find them better than the iPhone 4G leaked prototype (if it’s real).

Dell Lightening is a portrait slider with 1GHz QSD8250 Snapdragon processor, WVGA 4.1-inch OLED display, AT&T and T-Mobile 3G, 5 megapixel autofocus camera, 1GB of flash with 512MB RAM plus 8GB of storage on a MicroSD card (non-user-replaceable, assumed by Engadget), GPS, accelerometer, compass, FM radio, and full Flash support including video playback.

Phone isn’t expected to be released before the end of this year. Check out all slides at Engadget’s gallery.

[via Engadget]