Dell may be gearing up to launch one or more new smartphones, possibly based on Google’s Android operating system and/or Windows Mobile software. The prototypes, according to a report that cited anonymous sources, might include a touchscreen-based model and another with a slide-out keyboard. Apparently, Dell has had engineers working on the phones for more than a year, the sources said. To achieve anything near success, Dell would have to produce a smartphone that could compete against the likes of Apple, Nokia, Samsung, Research In Motion, Sony, HTC and Palm, among many more.