11.2.4Battery
In battery screen you can view the battery usage data since you last connected the phone to a power source. The screen also shows your battery status and how long it has been used since last charging. Touch one category, then you can learn its specific power consumption.
You can adjust power use via the screen brightness or screen timeout in Display screen.
11.2.5Applications
You use the Applications settings to view details about the applications installed on your phone, to manage their data and force them to stop, and to set whether you want to permit installation of applications that you obtain from web sites and emails.
11.3Personal
11.3.1Accounts & sync
Use the Accounts & Sync settings to add, remove, and manage your Email and other supported accounts. You can also use these settings to control how and whether all applications send, receive, and synchronize data on their own schedules, and whether all applications can synchronize user data automatically.
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General sync settings
Touch the switch 
to permit applications to synchronize data in the background, whether or not you are actively working in them. Unmarking this setting can save battery power and lowers (but does not eliminate) data use.
Touch an account to see all sync options. Mark the checkbox to permit applications to synchronize data on their own schedule.
You can also touch Menu icon 
and Sync now to synchronize data for chosen items of that account.
11.3.2Location services
Use GPS satellites
Check to use your phone’s global positioning system (GPS) satellite receiver to pinpoint your location within an accuracy as close as several meters (“street level”). The process of accessing the GPS satellite and setting your phone's precise location for the first time will require up to 5 minutes. You will need to stand in a place with a clear view of the sky and avoid moving. After this, GPS will only need
11.3.3Security
Screen lock
•None Touch to disable screen unlock security.
• Slide | Touch to enable slide unlock mode. |
•Pattern Touch to draw pattern to unlock screen.
• PIN | Touch to enter a numeric PIN to unlock screen. |
•Password Touch to enter a password to unlock screen.
•Face unlock Touch to look at your phone to unlock screen. 119