Check the battery power level
..................................................................................................................................................................................................................
253
Extend battery life
......................................................................................................................................................................................................................................
253
Format the device memory or a media card
...........................................................................................................................................................................................
254
View the amount of available memory
....................................................................................................................................................................................................
254
Best practice: Conserving memory on your device
................................................................................................................................................................................
254
The application memory on my device is low
.........................................................................................................................................................................................
255
SIM card
......................................................................................................................................................................................................................................................
256
About the SIM card phone book
...............................................................................................................................................................................................................
256
Add a contact to your SIM card
................................................................................................................................................................................................................
256
Copy contacts from your SIM card to your contact list
.........................................................................................................................................................................
256
Copy a contact from your contact list to your SIM card
........................................................................................................................................................................
256
Change a SIM card contact
......................................................................................................................................................................................................................
257
Delete a SIM card contact
........................................................................................................................................................................................................................
257
Store SMS text messages on your SIM card
...........................................................................................................................................................................................
257
About SIM card security
............................................................................................................................................................................................................................
258
Protect your SIM card with a PIN code
...................................................................................................................................................................................................
258
Change the SIM card PIN code
................................................................................................................................................................................................................
258
Change the display name for a phone number
......................................................................................................................................................................................
258
Security
........................................................................................................................................................................................................................................................
259
Security basics
............................................................................................................................................................................................................................................
259
Password keeper
........................................................................................................................................................................................................................................
261
Encryption
...................................................................................................................................................................................................................................................
263
Memory cleaning
........................................................................................................................................................................................................................................
266
Certificates
..................................................................................................................................................................................................................................................
267
PGP keys
.....................................................................................................................................................................................................................................................
275
Certificate servers
......................................................................................................................................................................................................................................
281
Key stores
....................................................................................................................................................................................................................................................
283
Smart cards
.................................................................................................................................................................................................................................................
286
Software tokens
..........................................................................................................................................................................................................................................
290
VPN settings
...............................................................................................................................................................................................................................................
291
About security self-tests
............................................................................................................................................................................................................................
292
Verify security software
.............................................................................................................................................................................................................................
292
Third-party application control
................................................................................................................................................................................................................
292
Troubleshooting: Security
.........................................................................................................................................................................................................................
296
Service books and diagnostic reports
......................................................................................................................................................................................................
298
Service books
..............................................................................................................................................................................................................................................
298
Diagnostic reports
......................................................................................................................................................................................................................................
299
Wi-Fi diagnostic reports
............................................................................................................................................................................................................................
301