Connect your phone to the PC using a USB cable while holding the button.

Flashing official firmware serves several critical purposes for device maintenance and repair:

Depending on your device's current state, there are two primary ways to install or update the firmware: 1. Official Over-the-Air (OTA) Update For working devices, use the Official ColorOS Update Guide : Open > About Device . Tap on the ColorOS banner to check for updates. If available, tap Download and Install .

This is the "gold standard" document for understanding the device. It is an internal document used by authorized service centers.