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Turn on or turn off data service or set roaming options........................................................................................................................................................................
230
Wireless networks that your device connects to....................................................................................................................................................................................
231
Change the connection speed for the wireless network.......................................................................................................................................................................
231
Turn on LED notification for wireless coverage......................................................................................................................................................................................
231
Check the status of network connections and services.........................................................................................................................................................................
232
Roaming......................................................................................................................................................................................................................................................
232
Preferred wireless network list.................................................................................................................................................................................................................
234
Troubleshooting: Wireless network coverage.........................................................................................................................................................................................
235
Power, battery, and memory.....................................................................................................................................................................................................................
237
Turn off your device...................................................................................................................................................................................................................................
237
Set your device to turn on and turn off automatically...........................................................................................................................................................................
237
Reset the device.........................................................................................................................................................................................................................................
237
Check the battery power level..................................................................................................................................................................................................................
237
Extend battery life......................................................................................................................................................................................................................................
237
Format the device memory or a media card...........................................................................................................................................................................................
238
View the amount of available memory....................................................................................................................................................................................................
238
Best practice: Conserving memory on your device................................................................................................................................................................................
238
The application memory on my device is low.........................................................................................................................................................................................
239
SIM card......................................................................................................................................................................................................................................................
240
About the SIM card phone book...............................................................................................................................................................................................................
240
Add a contact to your SIM card................................................................................................................................................................................................................
240
Copy contacts from your SIM card to your contact list.........................................................................................................................................................................
240
Copy a contact from your contact list to your SIM card........................................................................................................................................................................
240
Change a SIM card contact......................................................................................................................................................................................................................
241
Delete a SIM card contact........................................................................................................................................................................................................................
241
Store SMS text messages on your SIM card...........................................................................................................................................................................................
241
About SIM card security............................................................................................................................................................................................................................
242
Protect your SIM card with a PIN code...................................................................................................................................................................................................
242
Change the SIM card PIN code................................................................................................................................................................................................................
242
Change the display name for a phone number......................................................................................................................................................................................
242
Security........................................................................................................................................................................................................................................................
243
Security basics............................................................................................................................................................................................................................................
243
Password keeper........................................................................................................................................................................................................................................
245
Encryption...................................................................................................................................................................................................................................................
247
Memory cleaning........................................................................................................................................................................................................................................
250
Certificates..................................................................................................................................................................................................................................................
251
PGP keys.....................................................................................................................................................................................................................................................
259
Certificate servers......................................................................................................................................................................................................................................
265
Key stores....................................................................................................................................................................................................................................................
267