How to Easily Master Format LG K40S with Safety Hard Reset?

Tips and tricks to fix LG K40S problems. Cheap entry level smartphone comes with 6.1 inches LCD screen with HD resolutions at 720 x 1520 pixels. The first operating system use Android Pie 9.0. Do not expect to get Android Ten 10.0 firmware update because LG K40S does not give any information about possibility to get firmware upgrade. This phone use Mediatek MT6762 Helio P22 processor and also have dedicated graphic processor unit (GPU) PowerVR GE8320. Although LG K40S have dedicated GPU, but we can not use this phone for playing 3D HD games. Only several light games can work without problems using this phone. Find more review and information about how to solve troubles of LG K40S at community.

What is Advantage of LG K40S Specifications?

Network GSM 3G HSDPA or with 4G LTE
LCD 6.1 inches
Processor Octa-core 2.0 GHz Cortex-A53
GPU PowerVR GE8320
Bluetooth / GPS / Wifi
Memory Internal 32 GB
RAM 2 GB or 3 GB
External memory Slot MicroSD
Main Camera Dual 13 MP + 5 MP autofocus & LED flash
Front Camera 13 MP for video conference and selfie photography
Operating System Android Pie version 9.0
Battery Li-Ion 3500 mAh

How to Fix or Problem Solving for Recovery LG K40S hang or not responding or malfunctions or stuck or freezing or bricked ?

Internal memory become very important before buying a smartphone. LG K40S use 32 GB internal storage with 2 options of RAM, which are 2 GB and 3 GB. More bigger RAM will give better benefit for multitasking experience. With 32 GB, there are some free storage left after use for operating system and factory default apps. We can install more applications from Google Play Store like Kakaotalk, WeChat, Facebook, Telegram, Instagram, Skype, Whatsapp and some other more. We are not recommended to install new or not famous apps, because sometime, they may contain viruses or malware that can make troubles at our LG K40S like become slowly or hang or stuck or frozen or bricks or LCD touch screen not responsive. If we must install, then please read as many user review as possible before download to make sure no viruses or malware. 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 K40S 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 K40S. 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 K40S ?

This phone have limited RAM, sometime the apps crash or corrupt. It can make our LG K40S (LMX430HM) become run not normal or 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 K40S shutdown or turn off by itself. If it is not work, then try to press and hold POWER + VOLUME DOWN together until shutdown. After it 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 K40S 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 K40S ?

We can use microSD external card to copy or move important files using File Manager applications. If our LG K40S 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.

#Option 1, Hard Reset LG K40S with software menu

  1. Turn on the LG K40S
  2. Make sure the battery is not empty
  3. Backup important data at LG K40S 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 K40S will do the master reset process.

hard reset lg k40s LMX430HM

#Option 2, Hard Reset LG K40S Factory Default using Hardware Secret Button Key

In some conditions, we can not do anything at LG K40S 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 K40S with hardware key button:

  1. Turn off the LG K40S
  2. Make sure the battery LG K40S already full or more than 50%
  3. Press together and hold thePower Button + Volume Down Button
  4. If the Logo appear, then release thePower Button(do not release theVolume Down Button), then continue to press again thePower ButtonuntilRecovery mode / Factory resetmenu appear, then we can release all button now.
  5. Choose wipe data/factory resetusingVolume Button, and pressPower Buttonto Enter or OK
  6. The LG K40S 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 K40S forgot password code or security lock screen pattern or pin (lost password)?

This phone have dual camera which are 13 megapixel for wide and 5 megapixel for ultrawide. Front camera is 13 megapixel without LED flash. Many interesting photos can be taken from each camera. Some photos or videos maybe private, therefore we have to secure all important data from unauthorized people when LG K40S (LMX430HM) away from us or stolen or lost. Fingerprint is recommended to activate as first protections. We have to register our finger several time to make it recognize for unlock. Secondary protections should be activate for backup, please choose screen lock pattern or password pin protections. The problems will be happen when we forgot security answer or fingerprint can not unlock our phone, what should we do?

Do not worry because we can unlock or bypass forgotten screen lock pattern or password pin protections at LG K40S 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 K40S 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 K40S?

There is no secret hidden code for LG K40S to make it back to factory default. Do the options above to hard reset it.

How to Format or Erase Phone Memory at LG K40S ?

There are two phone memory type at LG K40S , 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 K40S 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 K40S Stronger, Life Longer and Not Fast to Drain ?

LG K40S (LMX430HM) have standard battery at 3500 mAh. The battery is not removable, therefore we can not replace with bigger capacity. If we want to use more longer time for watch movie or playing games, then please do some adjustment like make LCD screen brightness as low as possible and disable all not use connections like GPS or Bluetooth or NFC or Wifi.

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