How to Remove Unlocked Bootloader screen warning on ZTE Axon 7

Unlocking the bootloader on your Android smartphone affords you the luxury of installing custom ROMs, but an annoying thing with many smartphones is that after unlocking the bootloader, you will be shown a warning that your bootloader has been unlocked every time you boot the smartphone. The good news is that you can fix this issue and remove the “unlocked bootloader” warning; we’ve been able to successfully do this on the Moto G5S / Moto G5S Plus and Moto Z2 Force, and in this article, I’ll show you how to remove unlocked bootloader screen warning on ZTE Axon 7.

The ZTE Axon 7 was launched early in 2017 and is a flagship smartphone with interesting specifications. It comes with a 5.5-inch AMOLED display with a Quad HD (1440 * 2560) pixel resolution, Corning Gorilla Glass 4 protection and 538 PPI pixel density. It is powered by a quad-core 2.15GHz Snapdragon 820 processor with Adreno 530 GPU, and comes with 4GB of RAM and 64GB of internal memory which can be further expanded up to 256GB with microSD. It sports a 20MP camera at the rear and 8MP selfie shooter at the front, and runs on Android 6.0.1 Marshmallow out of the box with MiFavor UI 4.2 layered on top. It also supports 4G LTE and packs a 3,250mAh Li-ion battery with Qualcomm Quick Charge 3.0.

Page Contents

Problem: Warning message displayed on ZTE Axon 7 during reboot after unlocking bootloader

Before You Start:
Process

Problem: Warning message displayed on ZTE Axon 7 during reboot after unlocking bootloader

Before You Start:

Here is everything you need to know before you start the process of removing the unwanted warning message on your ZTE Axon 7. This includes file downloads you need to make, things you need to set up on your phone and PC, and guides you should refer to if you’re new to this. Tweaking on Android is a risky process and you need to set things up as perfectly as you can before going into it.

Guides

Downloads

A2017G&U-remove_BL_warning.zip File Download.
aboot.img Boot Image.

Things to Note

This tweak is only for the ZTE Axon 7 A2017G and A2017G B32 PNW (Project New World with Android 8 Oreo) models. It doesn’t work on the B13 (MF5.0) model of the phone.
Use this tweak only if you’re running the stock ZTE Axon 7 bootloader or Universal B15 ROM / B32 ROM on PNW.
This tweak is not for use on encrypted phones. Decrypt your phone before proceeding to apply this tweak.
Remove the security pattern on your phone before flashing the zip file.
Also, backup your data. This tweak won’t erase the data on your device, but make a backup to be on the safe side in case anything goes wrong.

Process

On your phone, go to Settings >> Developer Options and tick the USB Debugging setting.
Also, enable OEM unlock in Developer Options.
Install ADB and Fastboot, if you haven’t already.
Download the aboot.img file above and put it in the adb and fastboot installation folder on your PC.
Note the location of the files you downloaded above in your local memory. For best performance, keep it in the same folder as your ADB/Fastboot installation.
Turn off your smartphone and unplug it from any socket or power outlet.
Boot it into bootloader by pressing and holding down the volume down and power buttons together for around 6 seconds.
When the bootloader screen comes on, connect the device to your PC.
Unzip the A2017G&U-remove_BL_warning.zip file and copy/cut the file called fastboot_unlock.img.
Paste that file in the folder where adb.exe, axon7tool.exe, recovery.img, recovery.bin and aboot.img are located.
If there’s none open, open a new command window in that folder again (Shift + right-click and “open command window here”).
Type
adb push aboot.img /sdcard/
and hit enter.
Type
adb push fastboot_unlock.img /sdcard/
and hit enter.
Type
adb shell dd if=/dev/block/bootdevice/by-name/fbop of=/sdcard/fbop_lock.img
and hit enter.
Type
adb shell dd if=/dev/block/bootdevice/by-name/aboot of=/sdcard/aboot_lock.img
and hit enter.
Type
adb pull /sdcard/fbop_lock.img
and hit enter.
Type
adb pull /sdcard/aboot_lock.img
and hit enter.
Type adb shell dd if=/sdcard/fastboot_unlock.img of=/dev/block/bootdevice/by-name/fbop
and hit enter.
Type
adb shell dd if=/sdcard/aboot.img of=/dev/block/bootdevice/by-name/aboot
and hit enter.
Type
Adb reboot bootloader
and hit enter to go to the bootloader.

If you were able to successfully complete the above steps, you should not see the unlocked bootloader warning message the next time you boot your ZTE Axon 7 smartphone.