Turn off a wireless connection..................................................................................................................................................................................................................

210

About wireless coverage indicators.........................................................................................................................................................................................................

210

Network connection indicators................................................................................................................................................................................................................

210

Turn on wireless coverage notification....................................................................................................................................................................................................

211

About the preferred wireless network list...............................................................................................................................................................................................

212

Add a wireless network to the preferred wireless network list.............................................................................................................................................................

212

Change the order of preferred wireless networks..................................................................................................................................................................................

212

Delete a wireless network from the preferred wireless network list....................................................................................................................................................

213

Turn off data service..................................................................................................................................................................................................................................

213

About roaming............................................................................................................................................................................................................................................

214

Switch wireless networks manually.........................................................................................................................................................................................................

214

Verify the status of network connections and services.........................................................................................................................................................................

214

Wi-Fi connection settings.........................................................................................................................................................................................................................

215

Advanced Wi-Fi connection settings.......................................................................................................................................................................................................

218

UMA connection settings.........................................................................................................................................................................................................................

220

Wireless network coverage troubleshooting...........................................................................................................................................................................................

221

Power, battery, and memory.....................................................................................................................................................................................................................

223

Turn off your device...................................................................................................................................................................................................................................

223

Set your device to turn on and turn off automatically...........................................................................................................................................................................

223

Reset the device.........................................................................................................................................................................................................................................

223

Check the battery power level..................................................................................................................................................................................................................

223

Extend battery life......................................................................................................................................................................................................................................

223

Format a media card..................................................................................................................................................................................................................................

224

View the amount of available memory....................................................................................................................................................................................................

224

Best practice: Optimizing your device performance..............................................................................................................................................................................

224

SIM card......................................................................................................................................................................................................................................................

226

About the SIM card phone book...............................................................................................................................................................................................................

226

Add a contact to your SIM card................................................................................................................................................................................................................

226

Copy contacts from your SIM card to your contact list.........................................................................................................................................................................

226

Copy a contact from your contact list to your SIM card........................................................................................................................................................................

226

Change a SIM card contact......................................................................................................................................................................................................................

227

Delete a SIM card contact........................................................................................................................................................................................................................

227

Store SMS text messages on your SIM card...........................................................................................................................................................................................

227

About SIM card security............................................................................................................................................................................................................................

228

Protect your SIM card with a PIN code...................................................................................................................................................................................................

228

Change the SIM card PIN code................................................................................................................................................................................................................

228

Change the display name for a phone number......................................................................................................................................................................................

228

Security........................................................................................................................................................................................................................................................

229

Security basics............................................................................................................................................................................................................................................

229