Device

• Whether to retain personal data when restoring factory settings?
• How to solve this problem when the ambient light is dim and the light is dim?
• The flash of the rear camera is off.
• The rear camera cannot switch from the front camera.
• How to close the background program?
• The rear shell or mobile phone is pressed tightly.
• The banner notification is removed by sliding on the left and right sides.
• Double-click on black screen