How to Flash Firmware LG X Mach Return to Stock and Fix a Bootloop.

How to Flash Firmware LG X Mach Return to Stock and Fix a Bootloop.

Flash LG X Mach Firmware.  If your phone gets bootloop it will only show an LG logo and stuck at this screen, and then return to reboot automatically and show this screen again. So, it's also called failed to boot the Android system and go to phone menu. At this state, your phone is still can access recovery menu or enter download mode. On this guide, we will try to fix this boot loop issue on Android LG X Mach by flashing this phone using a new firmware with kdz method. Simply just download the firmware from the available link below and then run LG Flash tool 2014 to help to flash firmware into LG X Mach via download mode. You don't need to take your phone to the service center and you can try it by yourself to fix this issue.

Also, this guide will solve the soft-brick on LG X Mach. Before this flashing guide starts lets we know more about LG X Mach specifications. For some countries, LG X Mach is also known as with LG K600 or LG X Fast.
  • This device released at 2016, September.
  • Comes with 5.5 Inches, IPS LCD capacitive touchscreen, 16M colors
  • Powered by; Hexa-core (4x1.4 GHz Cortex-A53 & 2x1.8 GHz Cortex-A57) processor, Qualcomm MSM8992 Snapdragon 808 chipset, and Adreno 418 GPU.
  • Supported by: 3000 MB of RAM
  • Run on Android 6.0.1 (Marshmallow)
  • Camera specs; 12,3 Mp of primary camera, and 8 MP of secondary camera.
  • Battery specs; Removable Li-Ion 3000 mAh battery.
Now, let's we start to flash the LG X Mach phone. Below is step by step guide you can try by yourself. Please read carefully in order to avoid your device totally damaged.


The following files are used to help you run flashing process on your LG X Mach. Download it one by one until completed.
1. This flashing method using kdz file, therefore you must provide the LG KDZ firmware to proceed this guide. There is two way you can try to download this file.

- Download LG Kdz file by yourself using the web browser and IMEI phone number.
4. LG mobile support tool and install it on your computer.

Flashing Guide.

Video Guide.

1. Extract Kdz Firmware and the other file to your computer local disk, we recommend saving this kdz and LG driver to the desktop for easy access later.
2. Make sure your LG X Mach is fully charged or at least has 75% of battery capacity before flashing process.
3. To avoid failed when detecting your LG phone the LG driver should installed correctly on your computer or PC.
4. If you see any error when installing LG driver, try to install Visual C++ Runtime Library first.
5. Now, go to LG flash tool 2014 folder, and run it as administrator. (right click at LG Flashtool2014.exe - select run as administrator).
run as administrator - Flash LG X Skin
run as administrator - Flash LG X Skin
6.Once the LG Flashtool 2014 window is launched. Now you can set this windows as the following guide.
flash LG X Skin
flash LG X Skin
  • Number 1: At Select type, you can choose 3GQCT
  • Number 2: Select DIAG at phone mode drop-down menu.
  • Number 3: Browse where your kdz saved on your computer drive.
  • Number 4: Click normal flash, it will Flash ROM without losing any data. Only use this when you need to fix system error. For some selected type, you will see CSE flash beside normal flash. CSE flash used for fresh format your phone. Also, it used to downgrade or upgrade phone firmware.
7. If you click the normal flash button, then you will see next window as shown in the picture below. On this window, you can continue the process by click Start button
flash LG X mach
flash LG X mach
8. Now, you will see country & Language window, on this window click clear phone software update registry button.
9. Now, go to your phone and turn off your LG X Mach.
11. Then connect your LG X Mach to the computer via USB cable while press and hold Volume Up button.
12. Release volume up button when your LG X Mach enter download mode. And your phone will show this screen.
enter download mode LG X Mach
enter download mode LG X Mach
13. Now, back to LG Flash tool 2014 window (country & Language window) and click OK button.
14. Now, you will automatically launch LG Mobile Support Tool window on a screen.
LG Mobile Support Tool
LG Mobile Support Tool
15. Just wait for the flashing process until it done. It will take a while depending on firmware size and phone models.
16. Once it reaches 100% completed, your LG X Mach will reboot automatically, and you can click the exit button.
17. Now, you can unplug your LG X Mach form USB cable, and while it boots up and ready to use you can set up your phone as the first time you bought it.

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