Java® applications for BlackBerry® devices can connect to the Internet using the Internet gateway that the wireless service provider provides. Most wireless service providers provide their own Internet gateway that offers direct TCP/IP connectivity to the Internet. Some operators also provide a WAP gateway that lets HTTP connections occur over the WAP protocol. Java applications for BlackBerry devices can use either of these gateways to establish connections to the Internet. If you write your application for BlackBerry device users who are on a specific wireless network, this approach can often yield good results. However, if you write your application for BlackBerry device users on a variety of wireless networks, testing your application against the different Internet gateways and achieving a consistent and reliable experience can be challenging. In these scenarios, you may find it useful to use the BlackBerry® Internet Service, and use the wireless service provider’s Internet gateway as a default connection type if the BlackBerry Internet Service is not available.