adb sideload update.zip : Manually install system updates or custom ROMs.
adb devices : Check if your computer recognizes your Android device. adb reboot bootloader : Boot your device into Fastboot mode. Minimal-adb-fastboot-v1.4.3-setup.exe Free
: Click Next , choose your installation path (usually C:\Program Files (x86)\Minimal ADB and Fastboot ), and click Install . adb sideload update