When users can access a mobile network and Wi-Fi network simulaneously, users can perform multiple tasks over both networks. For example, a user with a BlackBerry® 8820 smartphone can send messages over a Wi-Fi network and can make a call over the mobile network at the same time.
If users' mobile network providers make UMA technology (GAN technology) available, and users have subscribed to the UMA feature, Wi-Fi enabled devices can access the mobile network providers' voice services and data services over a mobile network or a Wi-Fi network.
Wi-Fi enabled devices are designed to open a connection to the BlackBerry® Internet Service to access the BlackBerry MDS Connection Service, BlackBerry® Messenger, and other devices for PIN messaging. You can verify with your organization's wireless service provider whether your organization's service plan provides access to these services over a Wi-Fi network.