To enable or disable the use of two SIM cards
1Drag the status bar downwards, then tap 
.
2Find and tap Dual SIM settings.
3Mark or unmark the SIM1 and SIM2 checkboxes.
To rename a SIM card
1Drag the status bar downwards, then tap 
.
2Find and tap Dual SIM settings.
3Select a SIM card and enter a name for it.
4Tap OK.
To set a SIM card for data traffic
1Drag the status bar downwards, then tap 
.
2Find and tap Dual SIM settings.
3Tap the SIM card under SIM card for data traffic.
4Select an option.
Adjusting the volume
You can adjust the ringtone volume for incoming calls and notifications as well as for music and video playback.
To adjust the ring volume with the volume key
•Press the volume key up or down.
To adjust the media playing volume with the volume key
•When playing music or watching video, press the volume key up or down.
Adjusting the sound settings
You can adjust several sound settings. For example, you can set your device to silent mode so that it doesn't ring when you're in a meeting.
To set your device to vibrate mode
•Press the volume key down until 
appears in the status bar.
You can also press and hold down the power key 
and then tap 
in the menu that opens to set your device to vibrate mode.
To set your device to silent mode
1Press the volume key down until the device vibrates and 
appears in the status bar.
2Press the volume key down again. 
appears in the status bar.
You can also press and hold down the power key 
and then tap 
in the menu that opens to set your device to silent mode.
To set your device to vibrate and ring mode
1From your Home screen, tap 
.
2Find and tap Settings > Sound.
3Mark the Vibrate when ringing checkbox.
Time and date
You can change the time and date on your device.
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