I went ahead and let my phone update itself and since then it's been realllly SLOW. Phone calls take 5-45 seconds to connect, which is beyond aggravating. Apps don't run as fast as they use to. And I am constantly reconnecting the Mobile network because it keeps losing it. Anyone have similar and get around it??
A brief post about speeding up a HTC Hero.
Are you with Sprint by any chance?
This thread and this thread have at least one suggestion: Have a look in Menu > settings > About phone > System updates > HTC Software update. Apparently there is a .6 firmware patch. Unfortunately, most of the posts are not reassuring. Perhaps time to upgrade/change phones?