Dell has launched the Dell Aero, their first Android-based U.S. smartphone.

At 104 grams, the Dell Aero is one of the lightest Android smartphone in the U.S., available on AT&T 3G network, for US$99.99 on a two year contract, or US$299.99 outright.

The new handset supports YouTube and other Flash content via Adobe Flash Lite, comes with a 5-megapixel camera with 8x zoom, flash and advanced shooting and editing capabilities.

Dell Aero gives uses one-touch access to social networks, GPS and other features, including Wi-Fi access at more than 20,000 AT&T Hotspot locations in the U.S. This is in addition to its support for quad-Band GSM/GPRS/EDGE (850/900/1800/1900 MHz) and tri-Band UMTS/HSDPA (850/1900/2100 MHz).

The display uses Corning’s Gorilla Glass, to keep the Dell Aero safe from car keys, loose change, or other items prone to cause harm to the 3.5 inch (640x360 pixels) capacitive multi-touch display.