Before you can start and test your application on the device, you must have a test signature from QUALCOMM. Authenticated developers can use a web-based tool called Testsig on the BREW Developer extranet to generate test signatures. For specific information on how to generate and use your Testsig, see the BREW website. You can find extensive information on how to test your BREW applets to ensure that they ultimately comply with TBT (True BREW Testing) standards on the BREW Developer extranet.