These are the photos of Dell Mobile Phone (Lightning), a Windows Phone 7 portrait slider. That’s right — a portrait slider. The renders on these slides look slick as hell, but they’re no match for the spec sheet, which looks even better: 1GHz QSD8250 Snapdragon processor, WVGA 4.1-inch OLED display, AT&T and T-Mobile 3G, five megapixel auto-focus camera, 1GB of flash with 512MB RAM plus 8GB of storage on a MicroSD card (non-user-replaceable, we’re assuming), GPS, accelerometer, compass, FM radio, and full Flash support including video playback. We’ll see what happens with that — the ship date is pegged at Q4, indicating this is a WP7 launch device, and Microsoft’s told us Flash won’t make it into the OS initially. Here’s the real kicker, though — other slides in the deck indicate this thing is getting an upgrade to LTE in Q4 of 2011.