In this tutorial, we will guide you on how to install the Huawei JNY-L21 (Huawei P40 Lite) flash file using the Huawei Flash tool. On this page, you will find the official stock firmware file for the Huawei P40 Lite JNY-L21, drivers, and flash tool.

By flashing the Stock ROM file, you can always fix the device software issue such as boot loop, lag, soft brick or hard brick, remove pattern lock, FRP lock, and many more.

Also Read

How to Install Google Play Store or GMS on Huawei P40 lite and P40 Lite E

Huawei P40 lite JNY-L21, JNY-L22 Testpoint, Bypass FRP and Huawei ID

Advantages of Stock ROM:

Here are the answers to why you need to download and save the Huawei P40 Lite JNY-L21 Stock ROM flash file on your computer.

  • If your device is dead, you can unbrick using the Stock ROM file
  • You can fix or repair the IMEI on your device using DB files from Stock ROM
  • Remove any malware or Adwares from Huawei P40 Lite
  • You can fix the boot loop issue on the Huawei P40 Lite
  • Fix Unfortunately, the app has stopped error on Huawei P40 Lite
  • Fix Network related issue
  • Patch Boot image to Root using Magisk
  • You can unroot Huawei P40 Lite
  • To Reset or Remove FRP on your device
  • Restore Huawei P40 Lite back to Factory State

Huawei P40 Lite JNY-L21 Firmware Flash Files:

Steps to Install Huawei JNY-L21 Firmware Flash File

If you have downloaded the firmware, then follow this guide to flash the stock firmware manually on your Huawei P40 Lite JNY-L21. Make sure to follow the steps carefully.

Pre-Requirements:

  • This ROM is supported for the Huawei P40 Lite JNY-L21 variant only.
  • Make sure that your device should be charged at least 50% or higher.
  • You will require a PC or Laptop with a USB Data Cable.
  • We always recommend our readers take a full data backup of the device for safety purposes.
  • Download Huawei Multi-Download Tool on your PC and install it.
  • Download Huawei USB Drivers on your PC
  • You will also require to Download Huawei Handset Product Line Driver and install it.

Firmware Installation Guide:

Check out the firmware flashing guide below for the Huawei P40 Lite JNY-L21.

Disclaimer:

1. Update from USB Stick

  • Extract the dload stock firmware of Huawei P40 Lite and transfer the three extracted files to the Huawei NM Card or to the memory stick.
  • Now head over to the dialer and enter ##2846579##. From the menu that appears, select the Software Update option.
  • After that, select the Memory Card Upgrade. The system will now read files from the inserted SD card/USB storage or NM Card and will subsequently flash the file.
  • When the installation is complete, you could safely remove the OTG.

2. SD Card Update Method

  • Create a new folder called dload on your MicroSD card.
  • Extract the downloaded firmware zip file on PC > Copy the UPDATE.APP file into the dload folder on your MicroSD card.
  • Switch off your handset > Long-press Vol Up + Vol Down + Power key together for a few seconds until the fastboot mode appears.
  • You’ll see ‘Installing system update’ > Wait for a while > Your device will automatically reboot after flashing.

3. Manually Flash Stock ROM

  • First of all, Download and extract the Huawei smartphone Multi Download Tool on your computer.
  • Now, Download and Install the Huawei Handset Product Line Driver and Huawei USB Driver your PC.
  • Launch the QPBLFBML01.exe file to open the Huawei Multi-Download Tool.
  • Next, you will see the XML firmware file upload option.
  • Click on the Browse button (three-dot icon) and it will ask for the password.
  • Don’t put anything, just leave it blank and click on the Set button.
  • Now, select the .xml firmware file for your device and click on Open.
  • Then click on the Next button.
  • You will see the installation progress page. Connect your device via a USB cable with the Fastboot or Download Mode.
  • Next, click on the Scan&Download button to start flashing the stock firmware.
  • It will automatically detect the Fastboot device and will take some time to install it.
  • Once flashing done, restart your device.

That’s it, guys. We hope this guide was helpful to you. Feel free to ask in the comment below for additional queries.