If your phone's screen is flickering or tearing after reaching 80% charge, please refer to the following steps to troubleshoot:
1. Ensure your phone is not overheating while charging. Overheating can cause performance issues, including screen tearing;
2. If the battery is old or damaged, it can not maintain a consistent power supply, causing screen flickering or tearing. Please check the battery health;
3. Use the original charger or a different one with the correct specifications to ensure the charging process is stable;
4. Boot the phone into the Safe mode to rule out any third-party apps causing the issue;
5. Check for any available updates for your phone. If an update doesn’t resolve the issue, consider performing a factory reset to rule out any software bugs. Backup your data first, as a factory reset will erase all information from your phone.
If none of the above steps resolve the issue, please contact the after-sales for further inspections.