1. The phone changed the system or upgraded the system after the black shielding this we go to the official to see how to solve
2. The phone brushes the rom this may be the brush machine brush is broken, we can try to restore or refresh the system
3. Call black screen
1, click on the phone icon on the phone, and then into the millet phone "phone dial Interface" open access, the following figure.
2, then in the phone dial interface we entered, we pressed the "menu button" on the phone and clicked the "Settings" button in the pop-up menu, as shown below.
3, then we go to the Settings page, under the Phone column to open the "More Phone settings" option.
4, in the call Setup interface, we click on "Caller status settings," as shown below.
5, now we open the interface, we put "Enable distance sensor" open to try?
4. Installed the third party software black screen, we remove the software can hu.
5. There is also the root of your friends deleted some system applications or files caused by black screen, the brush system can be resolved.