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About wireless coverage indicators......................................................................................................................................................................................................... 213
Network connection indicators................................................................................................................................................................................................................ 213
Turn on wireless coverage notification.................................................................................................................................................................................................... 214
About the preferred wireless network list............................................................................................................................................................................................... 215
Add a wireless network to the preferred wireless network list............................................................................................................................................................. 215
Change the order of preferred wireless networks.................................................................................................................................................................................. 215
Delete a wireless network from the preferred wireless network list.................................................................................................................................................... 216
Turn off data service.................................................................................................................................................................................................................................. 216
About roaming............................................................................................................................................................................................................................................ 217
Switch wireless networks manually......................................................................................................................................................................................................... 217
Verify the status of network connections and services......................................................................................................................................................................... 217
Wi-Fi connection settings......................................................................................................................................................................................................................... 218
Advanced Wi-Fi connection settings....................................................................................................................................................................................................... 221
UMA connection settings......................................................................................................................................................................................................................... 223
Wireless network coverage troubleshooting........................................................................................................................................................................................... 224
Power, battery, and memory..................................................................................................................................................................................................................... 226
Turn off your device................................................................................................................................................................................................................................... 226
Set your device to turn on and turn off automatically........................................................................................................................................................................... 226
Reset the device......................................................................................................................................................................................................................................... 226
Check the battery power level.................................................................................................................................................................................................................. 226
Extend battery life...................................................................................................................................................................................................................................... 226
Format the device memory or a media card........................................................................................................................................................................................... 227
View the amount of available memory.................................................................................................................................................................................................... 227
Best practice: Optimizing your device performance.............................................................................................................................................................................. 227
SIM card...................................................................................................................................................................................................................................................... 229
About the SIM card phone book............................................................................................................................................................................................................... 229
Add a contact to your SIM card................................................................................................................................................................................................................ 229
Copy contacts from your SIM card to your contact list......................................................................................................................................................................... 229
Copy a contact from your contact list to your SIM card........................................................................................................................................................................ 229
Change a SIM card contact...................................................................................................................................................................................................................... 230
Delete a SIM card contact........................................................................................................................................................................................................................ 230
Store SMS text messages on your SIM card........................................................................................................................................................................................... 230
About SIM card security............................................................................................................................................................................................................................ 231
Protect your SIM card with a PIN code................................................................................................................................................................................................... 231
Change the SIM card PIN code................................................................................................................................................................................................................ 231
Change the display name for a phone number...................................................................................................................................................................................... 231
Security........................................................................................................................................................................................................................................................ 232
Security basics............................................................................................................................................................................................................................................ 232
Password keeper........................................................................................................................................................................................................................................ 233