IT WILL ERASE ALL DATA ON YOUR PHONE
AND KEEP YOUR BOOTLOADER UNLOCKED.
YOUR WARRANTY WILL BE VOID AFTER IT.
DO IT AT YOUR OWN RISK. DO IT CAREFULLY.
(It won't erase your SD card, but I still recommend you remove SD card before it)
Please read this thread carefully at least once before you modify your phone.
This thread is in order to give your X01AD a new life when it hard bricked.
First, Prepare the things you need :
Windows (10 is better) Platform. Tell me if you need Linux version.
Download the file below. QPST included QFIL.
Download from here(vnrom.net). (find version "15.2016.1902.159" under ZB633KL)
-Unofficial unlock tool (Maybe you need)
Download from here(other thread). (download unlock.zip)
(Perhaps you don't need below stuffs, see note.)
-A flat screwdriver or anything can pry the backcover of your phone.
-A slice of paper
It is for separate battery cable and port.
-A USB Cable that have good quality.
Second, install QPST and Qualcomm USB driver, and then reboot.
Third, launch QFIL, choose "Flat Build",click "Configuration">"FireHose Configuration"
and set up like this:
click "OK" after you completed setting,
Next, Click "Browse...", navigate to the folder you unzip the firmware, select 'prog_emmc_firehose_8953_ddr.mbn'.
Click "Load XML...", select 'rawprogram_unsparse.xml' in first window, select 'patch0.xml' in second window.
DON'T CLOSE WINDOW!
Fourth, enter EDL mode, try note1 first.
pry the back-cover of your phone.
Be careful, don't hurt your hand or screen, look carefully.
Remove battery cable cover, remove battery cable, put the paper between cable and port.
Next, connect your phone and computer.
Fifth, click "Select Port...", select 'Qualcomm......Port', click "OK".
Your "Download" button should available now. Click it.
And your phone will reboot automatically after flash completed.
Finally, your phone will boot into stock android 8 .
And if you get RED error, reboot into fastboot, run unofficial unlock. It should be resolve after that.
(Real relock bootloader method not found yet , it will get RED state after you lock the bootloader)
1 If you want enter EDL mode, "maybe" you can press VolUp+VolDown+Powerkey when power is off,
screen will be blank after a few seconds, and screen will not display anything during EDL mode.
Connect phone and computer to see whether QFIL detected device.
Long press Powerkey to exit EDL mode.
2 Serial number(string) will be erase, please follow this thread to recover that.