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Common settings
Airplane mode
When you enable Airplane (Flight) mode, all wireless radios on HTC Desire 21 pro 5G are turned off,
including the call function, data services, Bluetooth, and Wi-Fi.
When you disable Airplane mode, the call function is turned back on and the previous state of
Bluetooth and Wi-Fi is restored.
§ You can manually turn Bluetooth and Wi-Fi back on after enabling Airplane mode.
§ If Wi-Fi hotspot and Bluetooth tethering are turned on, enabling Airplane mode turns them off.
You need to manually turn them back on after you disable Airplane mode.
Do any of the following to turn Airplane mode on or off:
§ In Settings Network & internet Advanced, tap the Airplane mode On/Off switch to turn
Airplane mode on or off.
§ With two fingers, swipe down from the status bar to open the Quick Settings panel. Tap the
Airplane mode tile to turn airplane mode on or off.
When enabled, the Airplane mode icon
Setting when to turn off the screen
After a period of inactivity, the screen turns off to conserve battery power. You can set the idle time
before the screen turns off.
1. From the Home screen, tap Settings Display.
2. Tap Advanced.
3. Tap Screen timeout, and then tap the time before the screen turns off.
Screen brightness
Increase screen brightness to make reading the screen easier, or decrease the brightness level to
reduce eye strain.
1. From the Home screen, tap Settings Display.
2. Tap Brightness level. Drag the slider to set the maximum brightness you want for your
screen.
Adaptive brightness, which is turned on by default, automatically changes the screen brightness
to suit your lighting condition. It may exceed the maximum level that you've manually set. To
turn this feature off, tap Adaptive brightness, and then tap the On/Off switch.
is displayed in the status bar.
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