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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