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Reduce the screen backlight time.
Lower the screen brightness.
Turn Wi-Fi, Bluetooth and auto-sync off when not in use.
Disable the GPS function when not in use. Most applications using this function
will periodically query the GPS satellites for your current location, and each
query drains your battery.
Powering on/off
Press and hold the Power key to turn on your phone.
To power off, press and hold the Power key to open the options menu and
touch Power off > OK.
NOTE:
If the phone freezes or takes too long to respond, you can press and hold the Power
key for about 20 seconds to restart the phone.
Setting up for the first time
When you first power on your phone after you purchase it or reset it to factory
settings (see Backup and Reset), you need to do some settings before using it.
Flick the language field to select the language. Then follow the on-screen prompts to
set up your phone.
Locking/unlocking the screen and keys
Your phone allows you to quickly lock the screen and keys (put the phone to sleep
mode) when not in use and to turn the screen back on and unlock it when you need
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