adb backup -apk -shared -all -system -f backup.ab Restore with: adb restore backup.ab If USB debugging was already authorized before the lockout:
adb -s 1234567890ABCDEF shell If a flash is interrupted, fastboot continue can sometimes resume booting without re-flashing everything. 4. Creating a Full Device Backup via ADB (Without Root) While not a full system image, you can backup all user apps and data: adb fastboot tool
adb wait-for-device adb shell logcat > bootloop_log.txt Let it run while the device loops; you'll capture the crash reason. Download factory images from the manufacturer. Then: adb backup -apk -shared -all -system -f backup
adb tcpip 5555 adb connect 192.168.1.10:5555 List devices: adb devices (shows serial numbers). Target specific device: Download factory images from the manufacturer
From recovering photos off a broken screen to installing the latest Android version on an abandoned phone, these command-line tools offer a kind of technological liberation. They are intimidating at first—a blinking cursor waiting for arcane commands—but with practice, they become extensions of your intent. They are the keys to the kingdom. Use them wisely, and you will never fear a bricked device again. Disclaimer: Modifying system partitions, unlocking bootloaders, and using fastboot can void warranties and, if done incorrectly, permanently damage devices. Always ensure you have the correct firmware for your specific device model. Proceed at your own risk.