How to set Countdown vibration?
How to change the language of the built-in apps, like vivo App Store, Weather, and Game Center on the phone designed for Chinese users?
How to set 12-hour or 24-hour format?
How to change the system language?
How to change Time zone?
Which languages are supported on vivo phone?
How to change the date format?
How can I change the system language on my phone purchased in Chinese Mainland?
vivo Scheduled power on/off damage my phone?
Auto time is not the right time. What should I do?
Why can I not set 201X(Year) on my phone?
How to set scheduled power on/off?
How to set scheduled vibration?
How to set scheduled off-line?