Blackberry 8520 User Guide - Page 8

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