Sony 12640775, ST21a2, ST21i2 manual To adjust the screen brightness, To set the screen to vibrate

Models: 12640775

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To adjust the screen brightness

Screen settings

To adjust the screen brightness

1 From your Home screen, tap .

2Find and tap Settings > Display > Brightness.

3To decrease the screen brightness, drag the slider to the left. To increase it, drag the slider to the right.

4Tap OK.

The brightness level affects your battery performance. For tips on how to improve battery performance, see Improving battery performance on page 14.

To set the screen to vibrate

1 From your Home screen, tap .

2Find and tap Settings > Sound.

3Mark the Vibrate on touch checkbox. The screen now vibrates when you tap soft keys and certain applications.

To adjust the idle time before the screen turns off

1 From your Home screen, tap .

2Find and tap Settings > Display > Sleep.

3Select an option.

To turn off the screen quickly, briefly press the power key To set the screen to vibrate.

To keep the screen active while the phone is charging

1 From the Home screen, tap .

2Find and tap Settings > Developer options.

3Mark the Stay awake checkbox.

Phone language

You can select a language to use in your phone.

To change the phone language

1 From your Home screen, tap .

2Find and tap Settings > Language & input > Language.

3Select an option.

If you select the wrong language and cannot read the menu texts, find and tap the Settings icon . Then select the entry beside , and select the first entry in the following menu. You can then select the language you want.

Flight mode

In Airplane mode, your phone's network and radio transceivers are turned off to prevent disturbance to sensitive equipment. However, you can still play games, listen to music, watch videos and other content, as long as all this content is saved on your memory card or internal storage. You can also be notified by alarms, if alarms are activated.

Turning on Airplane mode reduces battery consumption.

To turn on Airplane mode

1 From your Home screen, tap .

2Find and tap Settings > More….

3Mark the Airplane mode checkbox.

You can also select Airplane mode from the Phone options menu. To access the Phone

options menu, press and hold down the power key To adjust the idle time before the screen turns off.

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Sony 12640775, ST21a2, ST21i2 To adjust the screen brightness, To set the screen to vibrate, To change the phone language