Image Gallery: HTC Advantage X7510 Windows Mobile 6.1 Professional device Summary: The HTC Advantage X7500/7501 was one of the most powerful Windows Mobile devices and then HTC updated it with a 16GB flash drive, haptics feedback keyboard, and latest operating system. By Matthew Miller | May 20, 2008 -- 22:26 GMT (15:26 PDT) Follow @palmsolo Previous | Next Image 5 of 35 You can see some of the differences in the keyboards here. Topics: Mobility, Hardware, HTC, Mobile OS, Operating Systems, Software, Windows Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.