Full marks to Sprint for finally releasing a supported version of OS 4.5 for my BB 8830WE. The only downside of the upgrade was having to have my enterprise settings reactivated. I don’t think the tech support folks were too bent out of shape.
The device is now quite usable with a UI that looks quite modern. HTML email renders nicely. The browser is just about usable. Best part is the OS has been rock solid. I still prefer my Centro for personal use but this is a nice upgrade.