In this page you can find all tutorials for LG K40 and all models in this series.
Choose below what you want to know about your LG K40.

 

LG K40

 

 

 

 

How to delete all user data?
2 methods:

How to Hard Reset on LG K40?

  1. The device must be off.

    Hard Reset keys LG K40

  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".

    Factory data reset LG K40

  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».

    General settings on LG K40

  4. Then select «Factory data reset».

    Reset settings on LG K40

  5. Press «Reset phone».

    Factory data reset LG K40

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

    Reset Phone LG K40

  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».

    General Settings LG K40

  4. Then select «Language & Input».

    Language and input LG K40

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

    Language LG K40

  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».

    General LG K40

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

    About Phone LG K40

  6. Press «Build number» seven times.

    Software info LG K40

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

    Bulid number LG K40

  8. Activate «USB debugging».

    Developer options LG K40

  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 .

    Hidden Menu LG K40

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

    information about LG K40

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

    calenda LG K40

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

    check your Imei LG K40

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

    Google play service LG K40

 

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.

    Volume key LG K40

  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»

    UPPERCUT and Upgrade LG K40

  7. Then choose your KDZ file.

    KDZ file LG K40

  8. Finally click on Start key.

    Start key LG K40

  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.

    Power and Volume key LG K40

  4. Excellent! The screenshot has been saved.

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