Blackberry 8830 WORLD EDITION User Guide - Page 9

Find information about wireless coverage indicators ...217 Turn off a wireless connection ...217 Network connection indicators ...217 Turn on wireless coverage notification ...198 Check the wireless coverage level using a voice command ...37 About the preferred wireless network list ...218 Add a wireless network to the preferred wireless network list ...218 Change the order of preferred wireless networks ...218 Delete a wireless network from the preferred wireless network list ...219 Turn off data service ...219 About roaming ...220 Switch wireless networks manually ...220 About global roaming ...220 Global roaming prerequisites ...220 Connect to a GSM network ...221 Change the network mode ...221 Verify the status of network connections and services ...221 Wireless network coverage troubleshooting ...221 Power and battery ...223 Turn off your device ...223 Set your device to turn on and turn off automatically ...223 Check the battery power level ...223 Check the battery power level using a voice command ...38 Reset the device ...223 Extend battery life ...223 SIM card ...225 About the SIM card phone book ...161 Load the SIM card phone book ...161 Add a contact to your SIM card ...161 Change a SIM card contact ...161 Delete a SIM card contact ...162 About SIM card security ...226 Protect your SIM card with a PIN code ...226 Security ...227 Security basics ...227 Encryption ...228 Password keeper ...229 Advanced security ...232 Smart cards ...233