Make sure your phone is unlocked, has opened the USB debugging
First configured your computer to upgrade the environment (if you have configured you can ignore this step), to extract the files
Will contain the name of the adb and fastboot.exe copied to c: / windows / system32
Then copy all the files contained names adb to c: / windows / system
Click to download adb, fastboot
Download the official website and then you have to be ready to upgrade Android L mirror, can go to Google's
The upgrade process
connect your computer
Enter "adb reboot bootloader" in your computer's CMD command mode to enter bootloader mode
Download image tgz package to upgrade the compressed file and unzip it opened, and then extract the tar file
Open the unzipped folder and double-click the "flash-all.bat" to begin the upgrade
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