We don't know where the information came from and (as ever) we can't be absolutely certain that it's genuine, but over the last few days a range of specific details on some previously rumored HTC mobiles have turned up in data sheet and picture form over at PDAdb.net. First up is the HTC P6500 Sirius: a quad band, WiFi and EDGE device that runs Windows Mobile 6, has a 400MHz Samsung processor, a 3.5-inch QVGA display, and also comes with 256MB and 64MB of RAM and ROM respectively. Next up is the HTC S420 Erato flip smartphone, which could potentially be the successor to the Star Trek. This 99 gram, 2.4-inch screen flipper should come with the same 400MHz CPU and Windows Mobile 6 operating system as the Sirius, but adds features like UMTS and HSDPA connectivity, an FM radio receiver, SiRF Star III GPS, and a 2 megapixel shooter. Finally there's the touchscreen featured (but stylus lacking) HTC S730 Wings which shares the same CPU, operating system, connectivity, screen, camera, GPS, and storage as the Sirius. In fact, the only difference we can tell between the two is the addition of WiFi, the exclusion of FM, and a different form factor to accommodate a slide-out QWERTY keypad. PDAdb quotes possible release dates for these unannounced and currently rumored devices as August for the Sirius, April for the Erato, and July for the Wings. You can't get a more detailed "rumor" than that.

[Via GSMArena]

Since the codenames HTC uses for its upcoming devices are a source of endless amusement, we just wanted to take the opportunity to add another to the mix: "Erato." Sources tell us that's the moniker getting tossed around for the follow-up to the Star Trek, HTC's first foray into the wide world of fashion clamshells. Details are still totally sketch on this one, but if all we get is a Crossbow flip phone with HSDPA (or, heck, UMTS will do) and GPS, we'll be happy campers.