a) Check whether there is any damage to the screen. If yes, please back up your data and take your device and proof of purchase to our repair center to get more professional technical assistance.
b) Please restart the device. If it is because an app failed to open or is displaying a black screen after powering-on, uninstall the app and check whether the problem is solved.
c) The screen may appear black if the device is in battery save mode, running low on battery or if the brightness is turned down. Go into a dark area or room to make sure that this not the case.
d) Make sure the battery percentage is higher than 10%.
Enable “Adaptive brightness”: go to “Settings”->“Display”->enable “Adaptive brightness”.
Enable “Battery saver” mode: Swipe down to access the quick settings from any screen, and then enable “Battery saver” (In the second page or click “Edit” icon to add tiles).
e) Try to reset or update your device. (Refer to “How can I perform a factory reset on my device in the Back Up & Reset module” & “How can I upgrade my device in the Basic Settings module”).
If the previously described options do not help, you can contact our hotline or repair center to get more professional technical assistance. Find the hotline or repair center information from the official website or APP “Support Center”.

Note: Available settings and menus may vary depending on device model and software version.