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....................................................................................................................................................................................219
Delete a wireless network from the preferred wireless network list.....................................................................................................................................................219
Turn off data service....................................................................................................................................................................................................................................220
About roaming..............................................................................................................................................................................................................................................220
Switch wireless networks manually...........................................................................................................................................................................................................220
Verify the status of network connections and services..........................................................................................................................................................................220
Wi-Fi connection settings.............................................................................................................................................................................................................................221
Advanced Wi-Fi connection settings.........................................................................................................................................................................................................224
UMA connection settings............................................................................................................................................................................................................................226
Wireless network coverage troubleshooting............................................................................................................................................................................................226
Power, battery, and memory........................................................................................................................................................................................................... 229
Turn off your device.....................................................................................................................................................................................................................................229
Set your device to turn on and turn off automatically............................................................................................................................................................................229
Check the battery power level....................................................................................................................................................................................................................229
Check the battery power level using a voice command............................................................................................................................................................................41
Reset the device...........................................................................................................................................................................................................................................229
Extend battery life........................................................................................................................................................................................................................................229
View the amount of available memory on your device...........................................................................................................................................................................230
Best practice: Optimizing your device performance...............................................................................................................................................................................230
About the SIM card phone book.................................................................................................................................................................................................................158
Add a contact to your SIM card .................................................................................................................................................................................................................158
Copy contacts from your SIM card to your address book.......................................................................................................................................................................158
Copy a contact from your address book to your SIM card......................................................................................................................................................................158
Change a SIM card contact.........................................................................................................................................................................................................................159
Delete a SIM card contact...........................................................................................................................................................................................................................159
Store SMS text messages on your SIM card...............................................................................................................................................................................................79
About SIM card security...............................................................................................................................................................................................................................232
Protect your SIM card with a PIN code..................................................................................................................................................................................................... 233
Change the SIM card PIN code.................................................................................................................................................................................................................. 233
Change the display name for a phone number........................................................................................................................................................................................233
Security basics..............................................................................................................................................................................................................................................235
Password keeper...........................................................................................................................................................................................................................................236
Encryption......................................................................................................................................................................................................................................................238
Memory cleaning..........................................................................................................................................................................................................................................240
Certificates.....................................................................................................................................................................................................................................................241
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