How to upgrade to Android 5.0 and upgrade failure solution

Android5.0 upgrade process:

1. Your mobile device to connect the computer.

2. Input in the computer model of CMD "adb reboot bootloader" command to enter bootloader mode.

3. The upgrade will download mirror TGZ in compressed file open and unpack it, and then extract the tar file.

4. Open decompression folder, double-click the "flash - all. bat" can begin to upgrade.
If the phone after the restart is flash failed with the following solutions:

1, long press power key to turn it off.

2, press and hold the volume button at the same time, in the boot. Enter boorloader mode, select the recovery mode, click the power button to enter.

3, long press the power button.

4, enter the wipe data-yes, choose to wipe cache, choose to reboot.

5, shutdown restart, Android5.0 flash completed.