BlackBerry Messenger............................................................................................................................................................................................................... 177
Contacts.................................................................................................................................................................................................................................................. 177
Groups..................................................................................................................................................................................................................................................... 178
Conversations......................................................................................................................................................................................................................................... 179
Availability.............................................................................................................................................................................................................................................. 182
Applications................................................................................................................................................................................................................................. 185
Switch applications............................................................................................................................................................................................................................... 185
Add, update, or downgrade an application using the application center..................................................................................................................................... 185
Add an application................................................................................................................................................................................................................................. 185
View properties for an application...................................................................................................................................................................................................... 185
Delete a third-party application.......................................................................................................................................................................................................... 185
Receive a device password prompt before you add an application............................................................................................................................................... 186
View the size of an application database........................................................................................................................................................................................... 186
Check for application updates............................................................................................................................................................................................................. 186
About upgrading the BlackBerry Device Software........................................................................................................................................................................... 186
Prerequisites: Upgrading the BlackBerry Device Software over the wireless network.............................................................................................................. 186
Upgrade the BlackBerry Device Software......................................................................................................................................................................................... 187
Return to the previous version of the BlackBerry Device Software............................................................................................................................................... 187
Delete the previous version of the BlackBerry Device Software.................................................................................................................................................... 187
Application troubleshooting................................................................................................................................................................................................................ 187
Wireless network coverage....................................................................................................................................................................................................... 189
Find information about wireless coverage indicators...................................................................................................................................................................... 189
Turn off a wireless connection............................................................................................................................................................................................................. 189
Network connection indicators........................................................................................................................................................................................................... 189
Turn on wireless coverage notification............................................................................................................................................................................................... 190
About the preferred wireless network list.......................................................................................................................................................................................... 190
Add a wireless network to the preferred wireless network list....................................................................................................................................................... 190
Change the order of preferred wireless networks............................................................................................................................................................................ 190
Delete a wireless network from the preferred wireless network list............................................................................................................................................. 191
Turn off data service.............................................................................................................................................................................................................................. 191
About roaming........................................................................................................................................................................................................................................ 191
Switch wireless networks manually.................................................................................................................................................................................................... 192
About global roaming mode................................................................................................................................................................................................................. 192
Connect to a GSM or UMTS network.................................................................................................................................................................................................. 192
Set the wireless networks to use with global roaming mode.......................................................................................................................................................... 192
Verify the status of network connections and services................................................................................................................................................................... 193
Wireless network coverage troubleshooting..................................................................................................................................................................................... 193
Power, battery, and memory..................................................................................................................................................................................................... 195
Turn off your device............................................................................................................................................................................................................................... 195