Tips and tricks to fix LG K42 problems. It is known as LMK420HM model code. The screen size is 6.6 inches HD resolution at 720 x 1600 pixels. This phone can not work with 5G data network, but of course we still can use 4G fast Internet broadband at single or dual simcard number. Please note, this phone has MIL-STD-810G compliant for use at non standard situations.

Android 10 is factory default operating system that we can use after open from the box. This phone is powered by Mediatek MT6762 Helio P22 processor with dedicated GPU (graphic processor unit) PowerVR GE8320. Some users get issue when using LG K42 (LMK420HM) software or hardware. Therefore we wil try give more solutions, reviews and information about how to solve LG K42 troubles at www.hard-reset.org community.

 

What is Advantage of LG K42 Specifications and Features?

  • Network GSM 3G HSDPA or 4G LTE + 5G
  • LCD 6.6 inches
  • Processor Octa-core 2.0 GHz Cortex-A53
  • GPU PowerVR GE8320
  • Bluetooth / GPS / Wifi
  • Memory Internal 64 GB
  • RAM 3 GB
  • External memory Slot MicroSD
  • Main Camera Quad 13 MP + 5 MP + 2 MP + 2 MP
  • Main Camera Features autofocus & LED flash
  • Front Camera Motorized 8 MP for video conference and selfie photography
  • Operating System Android 10.0
  • Battery Li-Po 4000 mAh

 

 

How to Fix or Problem Solving for Recovery LG K42 hang or not responding or malfunctions or stuck or freezing or bricked ?

LG K42 is entry level smartphone with 64 GB internal storage with 3 GB RAM for multitasking. We will not get full 64 GB free storage, but we still have many space left for install many applications from Google Play Store.

However, we need to read many user reviews before install new or not famous applications, because they may contain viruses or malware that can make troubles if installed at our phone like become slowly or hang or stuck or frozen or bricks or LCD touch screen not responsive. These bad apps will not get any Verified by Play Protect information at downloaded process. Please note, usually Editor choice is good options to try for safety reasons.

What do we have to do when we get this trouble? First we have to remove temporary files and caches inside this phone by doing soft reset. After our LG K42 can run again, then please try to download one good antivirus like NORTON or AVAST. It will scan all installed applications and give recommendation if there are some high-risk setting. If the problems still happen, then next steps is doing hard reset or master format.

Please note, doing hard reset will remove or erase all important data, therefore we have to backup all data first before doing master format. Doing hard reset will remove all Google account from LG K42. For safety reasons, please do not install any unknown APK files, because it is very easy to make our phone getting trouble.

 

How to Force Shutdown or Force Soft Reset or Reboot or Restart LG K42 ?

This phone has standard RAM with 3 GB capacity for multitasking. Some installed apps may crash or corrupt when running at our phone. It can make our phone become hang or LCD touch screen not responding with finger touch. We need to force remove temporary files and caches inside this phone. Please press and hold POWER button until LG K42 shutdown or turn off by itself. If it is not work, then try to press and hold POWER + VOLUME DOWN together until shutdown.

 

After totally off, then we can press again POWER button to turn it ON. This process will not remove any important data, therefore we can do this process anytime we want. If our LG K42 still can work properly, but we want to clear temporary files and caches from some applications, then please press and hold POWER button until pop-up menu appear, continue choose Shutdown / Power off / Reboot menu.

 

How to backup data or Contact at LG K42 ?

We can use microSD external card to copy or move important files using File Manager applications. If our LG K42 has already signed in with Google account, by default our contact will be synchronize in the background to Google server. Please make sure we check all contact at Google contact server using Internet browse to make sure backup is done.

 

Please note: These options bellow may not work for some devices because of firmware update version or hardware troubles or some other possibilities.

#Option 1, Hard Reset LG K42 with software menu

  1. Turn on the LG K42
  2. Make sure the battery is not empty
  3. Backup important data at LG K42 because all data and applications will be erase or delete
  4. Go to Menu :  Setting > Backup and Reset > Factory Data Reset
  5. Choose : Reset Device > Delete all
  6. The LG K42 will do the master reset process.

 

hard reset lg k42

#Option 2, Hard Reset LG K42 Factory Default using Hardware Secret Button Key

 

In some conditions, we can not do anything at LG K42 touch screen or frozen in some state. So we can not access reset menu like Option #1, do not worry, because we can do hard reset LG K42 with hardware key button:

  1. Turn off the LG K42
  2. Make sure the battery LG K42 already full or more than 50%
  3. Press together and hold the Power Button + Volume Down Button
  4. If the Logo appear, then release the Power Button (do not release the Volume Down Button), then continue to press again the Power Button until Recovery mode / Factory reset menu appear, then we can release all button now.
  5. Choose wipe data/factory reset using Volume Button, and press Power Button to Enter or OK
  6. The LG K42 will continue master reset, wait for several minutes until the phone start like new again.

 

How to Unlock or Fix or Bypass or Solutions for LG K42 forgot password code or security lock screen pattern or pin (lost password)?

We can use four rear camera for take daily activity photos videos with 13 megapixel for wide + 5 megapixel for ultrawide + 2 megapixel for macro + 2 megapixel for DOF. We will have many private photos videos. Please secure all important data from unauthorized people when LG K42 (LMK420HM) away from us or lost or stolen.

The fingerprint is recommended to use, because it is work fast and accurate. We can use front camera for face unlock recognizing. We need to choose secondary protection for backup like password or pin or screen lock pattern. LMK420HM face unlock or fingerprint will not work after finish soft reset or reboot or restart. We have to activate using secondary protection. The problems will be happen when we forgot security answer or fingerprint can not recognize for unlock, what should we do?

Do not worry because we can unlock or bypass forgotten screen lock pattern or password pin protections at LG K42 use registered Google account. We have to force hard reset or master format using hardware button combination key like steps at #option 2 above.

After finish hard reset, this phone will ask for Verify your account with previous Google Account that has been used before performing hard reset. Please note that Google account is very important. This phone already use latest version of Android operating system, therefore LG K42 implement FRP (factory reset protection) to make our phone safe from hard reset when stolen or lost.

 

Is That Any Secret Code for Doing Format LG K42?

There is no secret hidden code for LG K42 to make it back to factory default. Do the options above to hard reset it.

 

How to Format or Erase Phone Memory at LG K42 ?

There are two phone memory type at LG K42 , one is internal memory and the other one is external memory. If we want to format internal memory phone then we have to do hard reset or reformat the operating system of LG K42 as well. Please use menu setting to do hard reset or reformat using #option 1 above, but make sure to give checkbox mark at Erase Internal SD card / Internal storage. Then it will reformat the factory default operating system and remove or erase any data inside internal memory.

To reformat or wipe or erase all data at external memory, we can use menu Setting > Storage > Erase Internal Storage / SD Card. Please always make sure all data has already backup before reformat or wipe everything, because it is hard to recover formatted / wiped data at internal or external storage.

 

How to Make Battery of LG K42 Stronger, Life Longer and Not Fast to Drain ?

Big battery 4000 mAh is ready to use for one day. Some users get battery drain issue. We have to do some adjustment to make battery work more longer, especially for playing games or watching movie several hours continuously. Please make LCD screen not too bright to save battery power usage and disable all not use connection like GPS or Bluetooth or Wifi. LG K42 does not have NFC connection.