Go to Settings > About Phone and tap "Build Number" seven times to unlock Developer Options , then enable USB Debugging.
Installation typically requires a PC with Android Debug Bridge (ADB) or specialized flashing tools. --- Download Android Lollipop 5.0 Os Zip File
If you tell me your , I can help you find the exact official download link and the specific tool you'll need for flashing. How to Install Lollipop Android 5.0 Go to Settings > About Phone and tap
The "zip file" usually refers to one of two things: an (used for a complete system reset) or an OTA (Over-the-Air) Update Zip (used to upgrade from a previous version without wiping data). --- Download Android Lollipop 5.0 Os Zip File