
A. Unlocking the bootloader:
If you are on stock Q: (if you’re already on pie skip to 7)
- Download the official downgrade to Pie link
(https://dlcdnets.asus.com/pub/ASUS/ZenFone/ZS630KL/UL-ASUS_I01WD-ASUS-18.1220.1909.194-1.1.1-user.zip) - Copy it to your sdcard
- Reboot to recovery (Power off the phone. Hold Vol + and Power until the fastboot menu apereas let go of power then use the volume keys to select Recovery and press on power to reboot)
- Select ‘Apply update from SD card’ and install the downgrade
- Factory reset the phone
- Finish the setup
- Download the bootloader unlock tool link
(https://dlcdnets.asus.com/pub/ASUS/ZenFone/ZS630KL/ZS630KL_SIGNED_UnlockTool_9.1.0.11_190708_fulldpi.apk?_ga=2.207298771.196584153.1585336624-481864687.1550002210)8. Remove any fingerprint/password - Run the app
- Congratulations you unlocked the bootloader
- Download the latest Q update link (https://dlcdnets.asus.com/pub/ASUS/ZenFone/ZS630KL/UL-ASUS_I01WD-ASUS-17.1810.2002.137-1.1.1-user.zip?_ga=2.207765714.196584153.1585336624-481864687.1550002210) (for 137)
- Copy it to your SDcard and install it using the steps 3 and 4
- Boot the phone
B. Installing TWRP:
- Download the latest TWRP (I recommend using the unofficial version made by mauronofrio) link (https://forum.xda-developers.com/zenfone-6-2019/development/recovery-unofficial-twrp-recovery-asus-t3937844)
- Reboot the phone to fastboot mode
- Open a cmd/powershell (holding shift then right click and clicking on Open PowerShell window here)
in the adb&fastboot folder on your pc. link for adb here
(https://dl.google.com/android/repository/platform-tools-latest-windows.zip)4. Connect your phone to the PC using an USB cable - Test the connection with the phone by running “fastboot devices” (your device should appear)
- Install TWRP using “fastboot boot twrp-zxzx.img” (the exact name of your twrp.img)
- Flash the permanent TWRP using the twrpInstaller.zip
C. Installing a ROM:
- Have stock on both slots
- While on stock A wipe cache,system and format data
- Flash the ROM.zip
IF THE ROM INCLUDES TWRP AND GAPPS YOU’RE BASICLY DONE ELSE: - Flash twrpInstaller.zip (IF THE ROM INCLUDES TWRP YOU DON’T NEED TO REFLASH TWRP)
- Reboot recovery
- Flash GAPPS-nano.zip
- Flash Magisk.zip
- Reboot system and you’re done