# Reboot to bootloader adb reboot bootloader fastboot -w Flash a custom recovery (TWRP) fastboot flash recovery twrp.img Reboot the device fastboot reboot Debugging the "Unknown" Issues Ever seen adb devices show unauthorized ? The RSA fingerprint changed. Revoke USB debugging authorizations on the device (Developer Options) and restart the ADB server:
Today, we are going to strip away the GUI and get our hands dirty with adb , fastboot , and systrace . When you install the Android SDK, you download several packages. The most critical is Platform-Tools . This package updates backward (meaning newer tools work with older Android versions) and includes the utilities necessary for a device to communicate with a computer. android_sdk platform tools
Every Android developer knows the comfort of Android Studio. The visual layout editors, the logcat windows, and the Gradle sync button are wonderful. But underneath the hood of every great developer workstation lies a lean, mean, command-line machine: . # Reboot to bootloader adb reboot bootloader fastboot
To check if fastboot sees your device (Volume Down + Power on most phones): When you install the Android SDK, you download