Check support for all devices

I did a simple application in the开发者_开发百科 blackberry OS 5.0.0 Is my app has support for all devices? If not, suggest better way to make my app support for all versions.

Basically you can do 2 things:

1. Install JDE/Eclipse plugin for every version and compile code looking for errors/warnings
2. Install different simulators and test your application there

And to be sure you get a widest range support, see:
What minimum BlackBerry OS should I develop for?
Developing for multiple versions of BlackBerry OS
How to define supported BlackBerry OS versions and models for application?