blackberry signing application

is it required to sign the black开发者_开发知识库berry application before installing it to the device ? , only for testing purpose while developing not for market release.

If you are installing it on to a physical device AND you use the protected APIS (which is pretty much any not J2me only classes) you do need to sign the applications.

Yes even for development.

Getting a signing key practically free and the process is very simple and you don't need to go through an approval process. I would HIGHLY recommend you get a signing cert even if your application currently doesn't need one (but since you are asking I assume it does)