Owner's Manual

54
Basics
prompted to draw and redraw your own pattern.
If you touch PIN or Password, you will be prompted to set a
numeric PIN or a password you must enter to unlock your screen.
The next time you turn on your phone or wake up the screen, you
must draw your unlock pattern or enter your PIN or password to
unlock the screen.
NOTE
Even when the screen is locked, you can still place an emergency
call by touching Emergency call on the screen to draw an unlock
pattern or enter your PIN or password.
Optimizing battery life
You can extend your battery’s life by turning off unwanted features
and applications. You can also monitor how applications and system
resources consume battery power.
Extending the life of your battery
You can extend the life of your battery by performing the following
operations:
Turn off radios that you are not using. •
If you are not using Wi-Fi, Bluetooth, or GPS, use the Settings
application to turn them off. See “Wireless & network settings” on
page 266 and “Location & security settings” on page 272. (The GPS
receiver is only turned on when you are using an application that
makes use of it.)
Turn down screen brightness and set a shorter screen timeout. •
See “Display settings screen” on page 271.
If you do not need automatic syncing for Contacts, Calendar, Gmail, •
and other applications, turn them off.
See “Configuring account sync settings” on page 135.