Upgrade Firmware for OnePlus Ace 3

• 中文：给一加 Ace 3 升级固件

My OnePlus Ace 3 runs on PixelOS, which doesn’t include the firmware, so I need to upgrade the firmware by myself.

Firmware is installed via fastboot and fastbootd, so we need to test them:

1. Connect the phone to the computer
2. Press the volume-down button and power button to enter fastboot
3. Run fastboot devices, and make sure the phone is in fastboot
4. Run fastboot reboot fastboot to enter fastbootd
5. Run fastboot devices, and make sure the phone is in fastbootd

My phone runs on PixelOS_aston-15.0-20250424 with PJE110_15.0.0.500 firmware, and I want to upgrade the firmware to PJE110_15.0.0.701.

Installation steps:

1. Press the volume-down button and power button to enter fastboot.
2. Download the firmware from this link. I will download PJE110_15.0.0.701. Extract the file.
3. Run install_images.sh on Linux/macOS, and install_images.bat on Windows.