Q：Screen flickering/black spots/accidental touches/lines
A：1. Did this happen after the device was dropped? If so, the screen may be broken. Please provide pictures or videos showing the problem so we can proceed with further investigation.
2. Try restarting the device. If that doesn't resolve the issue, try restoring the system to factory settings.
3. If the problem persists, it will require after-sales service for repair.
