All tutorials for LG K40 and all models in this series!

How to delete all user data?
2 methods:

How to Hard Reset on LG K40?

1. The device must be off.

   

2. Press and hold the Power button and the Volume Down key for a few seconds.
3. Release the Power button and press it again when the LG logo appears.
4. Then use the Volume keys and the Power button to select "Yes".

   

5. Select "Yes" one more time.
6. Excellent! Remember that all user data will be deleted.

How to Factory Reset through menu on LG K40?

1. The device must be on.
2. Open «Settings».
3. In Settings choose «Restart and Reset».

   

4. Then select «Factory data reset».

   

5. Press «Reset phone».

   

6. Now tap «Delete all» to complete the process.

   

7. Excellent! Remember that all user data will be deleted.

Change settings:

How to change language on LG K40?

1. The device must be on.
2. Open «Settings».
3. In Settings choose «General».

   

4. Then select «Language & Input».

   

5. Finally click on «Language» and «Add language».

   

6. Excellent! The language has been changed.

Enable Developer mode & USB debugging on LG K40?

1. The device must be on.
2. Open «Settings».
3. In Settings choose «General».

   

4. Then select «About phone».
5. Go to «Common» and tap «Software info».

   

6. Press «Build number» seven times.

   

7. Return to «Settings» and open «Developer options».

   

8. Activate «USB debugging».

   

9. Excellent! Developer options and USB debugging have been activated.

Top 5 secret codes for LG K40!

1. The first is: *#546368#*885#
   It is a Hidden Menu , in this menu you can test a lot of options on your device .

   

2. The second is: *#*#4636#*#*
    In this menu you can find all information about your phone such as: Battery info, User Statistics, Wifi info.

   

3. The third is: *#*#225#*#*
   Here you can find all information about calendar.

   

4. The fourth is:  *#06#
   Using this code you can check your iMei.

   

5. The fifth is: *#*#426#*#*
   In this Menu you can find all information about Google play service.

   

How to Flash Stock Firmware on LG K40?

1. To flash your phone, the following applications should be installed on your PC:
   LG UP 1.14
   LG UP 1.16
   UPPERCUT
   LG Drivers
2. Open LG Up latest version.
3. Turn off your phone and press and hold the Volume up button.

   

4. Connect your phone to PC using USB cable and continue holding the Volume up button.
5. When «Download Mode» appears on the screen release the Volume up key.
6. Now open UPPERCUT and select «Upgrade»

   

7. Then choose your KDZ file.

   

8. Finally click on Start key.

   

9. Excellent! The latest Stock Firmware update will be installed on your device.

How to take screenshot on LG K40?

1. The device must be on.
2. Decide what you want to capture.
3. Press and hold the Power button and the Volume Down key.

   

4. Excellent! The screenshot has been saved.