Device

• No 4G display, no 4G Internet access, no 4G registration, only 3G or 2G
• Can't take screenshot
• The call cannot be made, and the system prompts that the call cannot be connected.
• Applications cannot be installed.
• Play volume adjustment?
• How to Display lyrics When Music Is Played?
• The effect is poor when music or videos are played, resulting in jamming, noise, and even no sound.
• Play a recording