Boot Image Flasher is a shell script developed to streamline the flashing of boot images on Android devices equipped with A/B slot partitioning. This tool simplifies the flashing process for users by removing the relying on custom recovery or fastboot, offering a more direct and less time-intensive approach.
The creation of this script was motivated by the lack of custom recovery support on numerous devices, which traditionally compels the use of fastboot for image flashing.
Furthermore, devices equipped with Unisoc CPUs operating on Android 10 or higher are integrated with vbmeta-sign. This necessitates the signing of boot images with private keys subsequent to Magisk patching to avert boot loops.
The process involving new Magisk updates requires patching the boot.img using the latest Magisk app, followed by signing with private keys, and finally flashing via fastboot. This script was devised to streamline this process by enabling the flashing of the boot image to both A/B slots without the use of custom recovery or fastboot, thereby saving considerable time and simplifying the procedure for all devices.
There are two primary methods to use the Boot Image Flasher:
Method 1: Via Terminal Emulator
curl -s https://raw.githubusercontent.com/gitclone-url/Boot-img-flasher/Master/boot-img-flasher.sh -o boot-img-flasher.sh && (which sudo &>/dev/null) || pkg install -y tsu 2>/dev/null && sudo bash boot-img-flasher.sh
Method 2: Magisk
boot_flash.zip from here.For users of Generic System Images (GSIs) with prebuilt root access, the Magisk app can be utilized to patch the boot image. Subsequently, the patched image can be flashed using this script, with root permissions granted through the PHH Superuser App.
Note 1: The Magisk app is only required for patching the boot image.
Note 2: Devices with a Unisoc CPU running Android 10 or higher must initially flash a custom signed vbmeta-sign.img and after patching process with Magisk, the boot image necessitates signing with private keys before flashing.
For comprehensive instructions on signing Unisoc images with private keys, please refer to this Guide.
For those seeking GSI with prebuilt root access, please review the Frequently Asked Questions (FAQ) for insights into GSI basics and the various naming conventions used by GSI builders and maintainers than choose your GSI from here
Caution: This script is intended for advanced users well-versed in the risks associated with flashing boot images. Incorrect usage may lead to device bricking or data loss. Proceed at your own risk.
The Boot Image Flasher script is licensed under the GNU General Public License v2.0.
Contributions are welcome! To contribute, kindly submit a pull request.
For support, inquiries, or suggestions, feel free to reach out to the author via Telegram.