What version of BlackBerry JDE to use?
rdrimmie: 4.2 is the oldest worth developing for at this point, the vast majority of devices support it. My impression is that most developers currently use 4.5 (because the IDE tools are improved), then go back and compile for previous versions.The JDE is on its last legs, even internally RIM is switching to the Eclipse plug-ins they make available.RIM does have the numbers you need, but they're only available to Alliance developer partners, who are under NDA. From what I've heard (which is guaranteed to be somewhat inaccurate) more than 85% of devices are on 4.2 or greater, with the majority being on 4.5, which finally includes facilities for updating the OS over the air.