Turn off a wireless connection..................................................................................................................................................................................................................
210
210
210
211
212
212
212
213
Turn off data service..................................................................................................................................................................................................................................
213
About roaming............................................................................................................................................................................................................................................
214
214
Verify the status of network connections and services.........................................................................................................................................................................
214
215
Advanced Wi-Fi connection settings.......................................................................................................................................................................................................
218
220
Wireless network coverage troubleshooting...........................................................................................................................................................................................
221
223
Turn off your device...................................................................................................................................................................................................................................
223
223
223
223
223
Format a media card..................................................................................................................................................................................................................................
224
224
Best practice: Optimizing your device performance..............................................................................................................................................................................
224
226
About the SIM card phone book...............................................................................................................................................................................................................
226
Add a contact to your SIM card................................................................................................................................................................................................................
226
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
228
Protect your SIM card with a PIN code...................................................................................................................................................................................................
228
Change the SIM card PIN code................................................................................................................................................................................................................
228
228
229
229