If the ringtone is too low to be recognized or the ringtone doesn't ring, please try the following.

• Move the Ring/Silent switch of the device to enable Ring mode.
• Turn up the volume button of the device.
  Note: If you can't turn up the volume botton, tap "Sounds" in "Settings" on the device and turn on "Change with Buttons" of ringtones and notifications.
• Go to "Settings" on the device > Tap "Sounds" > Adjust the volume of ringtones and notifications with the volume slider.
• Go to "Settings" on the device > Tap "Sounds" > Turn on "Lock Sound."
• Go to "Settings" on the device > "Notifications" > Tap "SkyPhone" > Turn on "Sounds."

• Turn up the volume button of the device.
• Go to "Settings" on the device > "Sounds" > "Mode Settings" > Tap "Normal."

Note: The process can be different depending on your device model.

• in SkyPhone > "Ringtone" > Select any option other than "Silent" and tap ("OK" in Android).
• in SkyPhone > Turn off "Do Not Disturb."