7/ 21
charging failure or other problems.
Before the charging, ensure that the standard voltage and frequency of the local mains
supply match the rated voltage and power of the travel charger.
Optimizing battery life
You can extend your battery’s life between charges by turning off features that you
don’t need. You can also monitor how applications and system resources consume battery
power.
To guarantee the optimal performance of your battery, please stick to the following
rules:
Turn off radios that you aren’t using. If you aren’t using Wi-Fi, Bluetooth, or GPRS,
use the Setting application to turn them off.
Turn down screen brightness and set a shorter screen timeout.
If you don’t need them, turn off automatic syncing for Gmail, Calendar, Contacts, and
other applications.
Note: On the Home screen, press Menu icon and touch System Settings >Battery. The
Battery Use screen lists the applications that have been using the battery, from greatest to
least battery use. The top of the screen displays the time since you were last connected to
a charger or, if you’re currently connected to one, how long you were running on battery
power before you connected to a charger. Then each application or service that used
battery power during that time is displayed, in order of the amount of power they used.
Touch an application in the Battery Use screen to learn details about its power consumption.
Different applications offer different kinds of information.
3.3 Linking to the Networks and devices
Your phone can connect to a variety of networks and devices, including mobile
networks for voice and data transmission, Wi-Fi data networks, and Bluetooth devices,
such as headsets. You can also connect your phone to a computer, to transfer files from
your phone’s SD card and share your phone’s mobile data connection via USB.
Connecting to mobile networks
When you assemble your phone with a SIM card, your phone is configured to use your
provider’s mobile networks for voice calls and for transmitting data.
Connecting to Wi-Fi networks
Wi-Fi is a wireless networking technology that can provide Internet access at distances
of up to 100 meters, depending on the Wi-Fi router and your surroundings.
Touch Settings>Wireless & networks > Wi-Fi. Check Wi-Fi to turn it on. The phone
scans for available Wi-Fi networks and displays the names of those it finds. Secured
networks are indicated with a Lock icon.
Note: If the phone finds a network that you connected to previously, it connects to it
automatically.
Touch a network to connect to it. If the network is open, you are prompted to confirm
that you want to connect to that network by touching Connect. If the network is secured,
you’re prompted to enter a password or other credentials.
Connecting to Bluetooth devices
Bluetooth is a short-range wireless communications technology that devices can use
