According to Apple Insider, a San Diego-based lawsuit filed late last week alleges that Apple and its carrier partner AT&T have knowingly oversold iPhone 3G, promising fast speeds only to see a glut of customers bog down the network with devices that themselves are flawed.”…The plaintiff claims that the handset has required too much power. In tandem with the “high volume” of iPhones sold, the sheer signal demand has bombarded AT&T and in many cases kicks users down to the EDGE-based 2G network even when 3G coverage is guaranteed, according to the lawsuit.

… Neither Apple nor AT&T has publicly commented on the lawsuit, which is the second lawsuit in as many weeks concerning the same performance hiccups.”