Blackberry 8520 manual 227

About wireless coverage indicators	214
Network connection indicators	214
Turn on LED notification for wireless coverage	215
About the preferred wireless network list	216
Add a wireless network to the preferred wireless network list	216
Change the order of preferred wireless networks	216
Delete a wireless network from the preferred wireless network list	217
Turn off data service or set data service options when roaming	217
About roaming and international roaming	218
Switch wireless networks manually	218
Verify the status of network connections and services	218
Wi-Fi technology	218
Advanced Wi-Fi connection settings	222
UMA connection settings	224
Wireless network coverage troubleshooting	225
Power, battery, and memory	227
Turn off your device	227
Set your device to turn on and turn off automatically	227
Reset the device	227
Check the battery power level	227
Extend battery life	227
Format the device memory or a media card	228
View the amount of available memory	228
Best practice: Optimizing your device performance	228
SIM card	230
About the SIM card phone book	230
Add a contact to your SIM card	230
Copy contacts from your SIM card to your contact list	230
Copy a contact from your contact list to your SIM card	230
Change a SIM card contact	231
Delete a SIM card contact	231
Store SMS text messages on your SIM card	231
About SIM card security	232
Protect your SIM card with a PIN code	232
Change the SIM card PIN code	232
Change the display name for a phone number	232
Security	233
Security basics	233
Password keeper	234