LG LM-K400AM User Manual

LM-K400AM

Manuf & Model User Guide

ENGLISHENGLISH

MFL71717101 (1.0) www.lg.com

Your phone is designed to make it easy for you to access a wide variety of content. For your protection, we want you to be aware that some applications that you enable may involve the location of your phone being shared. For applications available through Cricket, we offer privacy controls that let you decide how an application may use the location of your phone and other phones on your account. However, the Cricket privacy tools do not apply to applications available outside of Cricket. Please review the terms and conditions and the associated privacy policy for each location-based service to learn how location information will be used and protected. In addition, your Cricket phone may be used to access the internet and to download, and/or purchase goods, applications, and services from Cricket or elsewhere from third parties. Cricket provides tools for you to control access to the Internet and certain Internet content. These controls may not be available for certain devices which bypass Cricket controls.

About this user guide

Thank you for choosing this LG product. Please carefully read this user guide before using the device for the first time to ensure safe and proper use.

• Always use genuine LG accessories. The supplied items are designed

only for this device and may not be compatible with other devices.

• Descriptions are based on the device default settings.

• Default apps on the device are subject to updates, and support for

these apps may be withdrawn without prior notice. If you have any questions about an app provided with the device, please contact the LG Authorized Service Center. For user-installed apps, please contact the relevant service provider.

• Modifying the device’s operating system or installing software from

unofficial sources may damage the device and lead to data corruption or data loss. Such actions will violate your LG license agreement and void your warranty.

• Some content and illustrations may differ from your device, depending

on the area, service provider, software version, or OS version, and are subject to change without prior notice.

• Software, audio, wallpaper, images, and other media supplied with

your device are licensed for limited use. If you extract and use these materials for commercial or other purposes, you may be infringing copyright laws. As a user, you are fully responsible for the illegal use of media.

• Additional charges may incur for data services, such as messaging,

uploading, downloading, auto-syncing and location services. To avoid additional charges, select a data plan suitable to your needs. Contact your service provider to obtain additional details.

• Failure to follow the instructions in this guide and improper use may

damage the device.

Instructional notices

WARNING: Situations that could cause injury to the user and third

CAUTION: Situations that may cause minor injury or damage to the

NOTE: Notices or additional information.

parties.

device.

Table of contents

Custom-designed Features

6 Multi-tasking feature 11 Google Assistant 13 Fingerprint recognition

Basic Functions

17 Product components and

accessories

18 Parts overview 21 Turning the power on or off 22 Installing the SIM card and

memory card

24 Removing the memory card 24 Battery 26 Touch screen 29 Home screen 37 Screen lock 41 Memory card encryption 42 Taking screenshots 42 Entering text 51 Do not disturb

Useful Apps

53 Installing and uninstalling apps 55 App Shortcuts 56 Phone 60 Messaging 61 Camera 72 Gallery 77 Chrome 78 Google apps 80 QuickMemo+ 83 Contacts 85 Clock 87 Music 88 LG Mobile Switch 88 SmartWorld 89 Game Launcher 89 Audio Recorder 89 Smart cleaning

3Table of contents

Settings

91 Settings 91 Network & internet 98 Connected devices 101 Sound 102 Notifications 102 Display 103 Wallpaper & theme 104 Lock screen & security 105 Privacy 106 Location 106 Extensions 109 Apps 109 Battery 110 Storage 110 Accounts 110 Digital Wellbeing & parental

controls

111 Google 111 System 114 Accessibility

Appendix

118 LG Language Settings 118 LG Bridge 119 Phone software update 121 Anti-Theft Guide 122 Open Source Software Notice

Information

122 Regulatory information

(FCC ID number, etc.)

123 Trademarks 124 Laser safety statement 125 More information 126 FAQ

For Your Safety

LIMITED WARRANTY USA

4Table of contents

Custom-designed Features

Multi-tasking feature

Recent Uses Screen

Swipe the Home button upward and hold to view the recent use history.

Pop-up window

You can open multiple apps on the screen and easily switch between them at any time.

Swipe up and hold from the bottom of the screen.

Tap the app icon on the top left of the app screen and select Pop-up

window.

• If you tap the app icon, the App info, Multi window, Pop-up

window and Pin app options appear.

The app appears in the form of a pop-up window on the screen.

• This feature may not be available in some apps or screens.

Custom-designed Features 6

Using the pop-up window

• : Minimizes the pop-up window. The pop-up window is minimized

into the app icon floating on the screen, which can be moved anywhere you want.

: Expands the app to full screen.

•

: Closes the app.

•

• To move the pop-up window: Drag the top of the pop-up window.

• To adjust the size of the pop-up window: Drag the left, right or

bottom edge of the pop-up window.

• You can open up to 5 apps using the pop-up windows.

• To select an app from the opened apps, tap one of the pop-up windows.

The selected pop-up window comes to the front.

• Pop-up windows cannot be moved to the status bar or navigation bar area.

Custom-designed Features 7

Using the app folder for pop-up windows

If you tap on the pop-up window, the pop-up window is minimized into the app icon.

You can move the app icon anywhere you want by dragging it.

If two or more pop-up windows are minimized, the app folder is created to contain the app icons.

• The recently-used app icon is used as the app folder icon. If you tab the

icon, all the icons for the minimized pop-up windows appear in the app folder.

Custom-designed Features 8

Pop-up windows apps folder

• If you touch and hold the app folder for pop-up windows and drag the

app folder into Remove, the app folder will be removed.

• To remove one of the apps from the app folder, open the app folder and

drag the app icon out of the app folder.

Multi window

When using Gestures navigation (by default)

Swipe up and hold from the bottom of the screen.

• Recently-used apps appear.

• If you tap the app icon, the App info, Multi window, Pop-up

window and Pin app options appear.

Tap the app icon on the top left of the app to be displayed in the

multiwindow and select Multi window.

• The selected app appears at the top half of the screen.

Tap the other app to be displayed in the multi window.

• The selected app appears at the bottom half of the screen.

Custom-designed Features 9

When using Buttons only navigation

Tap on the navigation bar.

• Recently-used apps appear.

• If you tap the app icon, the App info, Multi window, Pop-up

window and Pin app options appear.

Tap the app icon on the top left of the app to be displayed in the

multiwindow and select

• The selected app appears at the top half of the screen.

Tap the other app to be displayed in the multi window.

• To adjust the size of the split screen, drag the bar on the center of the

screen.

• To deactivate the multi window feature, drag the center bar up or down

to the end of the screen.

• The multi window feature is not supported in some LG apps or apps

downloaded from Play Store.

Custom-designed Features 10

Google Assistant

Google Assistant overview

Your device has the built-in Google Assistant feature. Find answers and get things done while on-the-go.

• To use this feature, first connect to the network and sign in to your

Google Account.

Press the Google Assistant key on the left side of the device.

or Swipe diagonally from a bottom edge of the screen.

Follow the on-screen instructions.

• The device saves your voice data for recognition.

Set whether to use the voice match unlock function.

• If you use the voice match unlock function, you can unlock the

device even when the device screen is turned off or the device is charging by saying “OK Google” or “Hey Google”.

Custom-designed Features 11

• For stronger security, it is advisable to use Pattern, PIN, or Password.

• When a similar voice or your recorded voice is used, the screen may be

unlocked.

• To use this feature, tap Settings

lock settings set to unlock the device. Tap Voice Match, then tap Unlock with Voice Match

that Swipe is excluded.

• You need to unlock the device by using the specified method if you fail

to unlock the device with voice recognition. See for details.

Tap Save.

Smart Lock, and then use the screen lock method you

, then enter the currently used unlock method again. Note

Lock screen & security Secure

Setting a screen lock

Accessing by Voice

When the home screen is turned off or locked, say “OK Google” or

“Hey Google”.

When the Google Assistant screen appears, say a command or ask a

question.

Accessing from Home Screen or Any Other Screen

Press the Google Assistant key on the left side of the device.

or Swipe diagonally from a bottom edge of the screen.

Say a command or question when you see on the bottom of the

screen.

• Voice recognition accuracy may decrease if you speak with an unclear

voice or in a noisy place. When you use the voice recognition feature, increase its accuracy by speaking with a clear voice in a quiet place.

Custom-designed Features 12

Fingerprint recognition

Fingerprint recognition overview

You must register your fingerprint on your device first before using the fingerprint recognition function.

You can use the fingerprint recognition function in the following cases:

• To unlock the screen.

• To view locked contents in QuickMemo+.

• Confirm a purchase by signing in to an app or identifying yourself with

your fingerprint.

• Your fingerprint can be used by the device for user identification. Very

similar fingerprints from different users may be recognized by the fingerprint sensor as the same fingerprint. For added security, set the screen lock using a pattern, PIN or Password.

• If the device cannot detect your fingerprint, or you forget the value

specified for registration, visit the nearest LG Customer Service center with your device and ID card.

Precautions for fingerprint recognition

Fingerprint recognition accuracy may decrease due to a number of reasons. To maximize the recognition accuracy, check the following before using the device.

• Ensure that the fingerprint sensor is not damaged by a metallic object,

such as coin or key.

• When water, dust or other foreign substance is on the fingerprint

sensor or your finger, the fingerprint registration or recognition may not work. Clean and dry your finger before using the fingerprint sensor.

• A fingerprint may not be recognized properly if the surface of your

finger has a scar or is not smooth due to being soaked in water.

Custom-designed Features 13

• If you bend your finger or use the fingertip only, your fingerprint may

not be recognized. Make sure that your finger covers the entire surface of the fingerprint sensor.

• Scan only one finger for each registration. Scanning more than one

finger may affect fingerprint registration and recognition.

• The device may generate static electricity if the surrounding air is dry.

If the surrounding air is dry, avoid scanning fingerprints, or touch a metallic object, such as coin or key, to remove static electricity before scanning fingerprints.

Registering fingerprints

You can register and save your fingerprint on the device to use fingerprint identification.

On the home screen, tap Settings Lock screen & security

Fingerprints.

• This feature is available only when the screen lock is set.

- Lock the device with a pattern, PIN or password.

• If the screen lock is not set, enable it by following the on-screen

instructions. See

Locate the fingerprint sensor on the back of the device and gently put

your finger on it to register the fingerprint.

Setting a screen lock

for details.

Custom-designed Features 14

Follow the on-screen instructions.

• Repeat scanning the fingerprint by moving your finger little by little

until the fingerprint is registered.

When the fingerprint registration is done, tap OK.

• Tap Add more to register another fingerprint. If you register only

one fingerprint and the corresponding finger is not in a good condition, the fingerprint recognition may not work well. As a preventative measure, register multiple fingerprints.

Managing fingerprints

You can edit or delete registered fingerprints.

On the home screen, tap Settings Lock screen & security

Fingerprints.

Unlock according to the specified lock method.

From the fingerprint list, tap a fingerprint to rename it. To delete it,

tap

Unlocking the screen with a fingerprint

You can unlock the screen or view locked content by using your fingerprint.

On the home screen, tap Settings Lock screen & security

Fingerprints.

Unlock according to the specified lock method.

On the fingerprint settings screen, activate the desired function:

• Screen lock: Unlock the screen with a fingerprint.

• Content lock: Access contents you have locked in QuickMemo+

with a fingerprint.

Custom-designed Features 15

Basic Functions

Product components and accessories

The following items are included with your device.

• Device

• USB cable

• Charger

• The items supplied with the device and any available accessories may

vary depending on the area and service provider.

• Do not use unapproved USB cables or chargers with your device. The

LG limited warranty does not cover damage caused by the use of third party accessories.

• Some of the device parts are made of tempered glass. If you drop your

device on a hard surface or subject it to severe impact, the tempered glass may be damaged. If this happens, stop using your device immediately and contact the LG Authorized Service Center.

• If any of these basic items are missing, contact the dealer from which

you purchased your device.

• To purchase additional basic items, contact the LG Authorized Service

Center.

• To purchase optional items, contact the LG Authorized Service Center

for available dealers.

• Some items in the product box are subject to change without notice.

• The appearance and specifications of your device are subject to change

without notice.

• Device specifications may vary depending on the area or service provider.

• Be sure to use authentic accessories provided by LG Electronics. Using

third-party accessories may damage the device or cause malfunctions.

• Quick Start Guide

• Ejection pin

Basic Functions 17

Parts overview

Microphone

Charger/USB cable port

Proximity/Ambient light

Front camera lens

sensor

Earpiece

Volume keys (+/-)

Google Assistant

Nano-SIM/Memory card

Stereo headset jack

Rear camera lens

tray

Speaker Microphone

Power/Lock key

Touch screen

Flash

Fingerprint sensor

Basic Functions 18

• Press and hold the volume down key and Power/Lock key at the same

time for a second to take a screenshot.

Do NOT attempt to remove the back cover.

This device has a non-removable battery. Do not attempt to remove the back cover. Doing so may severely damage the battery and device, which could cause overheating, fire, and injury.

• Proximity/Ambient light sensor

- Proximity sensor: During a call, the proximity sensor turns off the

screen and disables touch functionality when the device is in close proximity to the human body. It turns the screen back on and enables touch functionality when the device is outside a specific range.

- Ambient light sensor: The ambient light sensor analyzes the ambient

light intensity when the auto-brightness control mode is turned on.

• Volume keys

- Adjust the volume for ringtones, calls or notifications.

- While using Camera, gently press a Volume key to take a photo. To

take continuous photos, press and hold the Volume key.

- Press the Volume Down key twice to launch the Camera app when

the screen is locked or turned off. Press the Volume Up key twice to launch Screen-off memo.

• Power/Lock key

- Briefly press the key when you want to turn the screen on or off.

- Press and hold the key when you want to select a power control

option.

• Google Assistant key

- Activate Google assistant. See

Google Assistant

for details.

Basic Functions 19

• Some functions may be restricted for access, depending on the device

Good example

Bad example

specifications.

• Do not put heavy objects on the device or sit on it. Failure to do so may

damage the touch screen.

• Screen-protective film or accessories may interfere with the proximity

sensor.

• If your device is wet or is being used in a humid place, the touch screen

or buttons may not function properly.

Hold the device correctly as shown below. If you cover the microphone hole with a hand, finger, or protective case while using the device, you may sound unclear during a call.

Do not cover the microphone.Microphone

Basic Functions 20

Turning the power on or off

Turning the power on

When the power is turned off, press and hold the Power/Lock key.

• When the device is turned on for the first time, initial configuration

takes place. The first booting time for the smart phone may be longer than usual.

Turning the power off

Press and hold the Power/Lock key, then select Power off.

Restarting the device

When the device is not working properly or does not respond, restart it by following the instructions below.

Press and hold the Power/Lock key and the Volume Down key at the

same time until the power is turned off.

When the device restarts, release the key.

Power control options

Press and hold the Power/Lock key, then select an option.

• Power off: Turn the device off.

• Restart: Restart the device.

Basic Functions 21

Installing the SIM card and memory card

Insert the SIM card from your mobile service provider and the separately purchased memory card into the device.

• Be careful with the ejection pin since it has a sharp edge.

• In order for the water-resistant and dust-resistant features to work

effectively, the card tray must be inserted correctly.

Insert the ejection pin into the hole in the card tray and then pull out

the card tray from the device.

Place the SIM card and/or memory card on the card tray and then

insert the card tray into the device in the direction of the arrow.

Basic Functions 22

• This device supports only Nano SIM cards.

Nano Micro Standard

• For problem-free performance, it is recommended to use the phone

with the correct type of SIM card. Always use a factory-made SIM card supplied by the service provider.

• Do not lose your SIM card. LG is not responsible for damage and other

issues caused by loss or transfer of a SIM card.

• Be careful not to damage the SIM card when you insert or remove it.

• When you insert the SIM card or memory card, place it on the card tray

correctly.

• When you insert the card tray back into the device, insert it horizontally

in the direction of arrow as shown in the figure. Make sure that the card placed on the card tray does not move out of its position.

• Insert the SIM card with the gold-colored contacts facing downwards.

• Be sure to insert the SIM card into the device by following the

instructions in the user manual.

• If you insert to or remove the card tray from the device, be careful not

to let water or other liquids enter into the card tray. If a wet card tray or card is inserted into the device, your device may get damaged.

• Memory card is an optional item.

• Frequent writing and erasing of data may shorten the memory card

lifespan.

• Some memory cards may not be fully compatible with the device. If you

use an incompatible card, it may damage the device or the memory card, or corrupt the data stored in it.

Basic Functions 23

Removing the memory card

Unmount the memory card before removing it for safety.

On the home screen, tap Settings Storage .

Insert the ejection pin into the hole in the card tray and then pull out

the card tray from the device.

Remove the memory card from the card tray.

Insert the card tray back into the slot.

• Do not remove the memory card while the device is transferring or

accessing information. This may cause data to be lost or corrupted, or may damage the memory card or the device. LG is not responsible for losses that result from the abuse or improper use of memory cards, including the loss of data.

Battery

Charging the battery

Before using the device, fully charge the battery.

Charging cable terminal

USB Type-C port

Basic Functions 24

USB Type-C cable

• Ensure that the inside of the device does not make contact with a

metallic object or water.

• Do not charge while the device or charging cable is wet or contains

moisture. This can cause fire, electric shock, injury or damage to device. If there is moisture, stop using the device immediately and remove the moisture completely.

• Do not use unapproved USB cables or chargers with your device. The

LG limited warranty does not cover damage caused by the use of third party accessories.

• Using the device when it is charging may cause electric shock. To use the

device, stop charging it.

• Remove the charger from the power socket after the device is fully

charged. This prevents unnecessary power consumption.

• Another way to charge the battery is by connecting a USB cable

between the device and a desktop or laptop computer. This may take a longer time than plugging the adapter to a wall outlet.

• Do not charge the battery by using a USB hub that is unable to maintain

the rated voltage. Charging may fail or unintentionally stop.

• Since the battery is a consumable, the battery life may be shortened as

time goes.

Basic Functions 25

Using the battery efficiently

Battery lifespan may decrease if you keep many apps and functions running simultaneously and continuously.

Cancel background operations to increase battery life. To minimize battery consumption, follow these tips:

• Turn off the Bluetooth® or Wi-Fi network function when not using

them.

• Set the screen timeout to as short a time as possible.

• Minimize the screen brightness.

• Set a screen lock when the device is not in use.

• Check the battery level while using any downloaded apps.

Touch screen

You can familiarize yourself with how to control your device by using touch screen gestures.

Tapping

Lightly tap with your fingertip to select or run an app or option.

Touching and holding

Touch and hold for several seconds to display a menu with available options.

Double-tapping

Tap twice quickly to zoom in or out on a web page or map.

Basic Functions 26

Dragging

Touch and hold an item, such as an app or widget, then move your finger to another location in a controlled motion. You can use this gesture to move an item.

Swiping

Touch the screen with your finger and move it quickly without pausing. You can use this gesture to scroll through a list, a web page, photos, screens, and more.

Pinching and spreading

Pinch two fingers to zoom out such as on a photo or map. To zoom in, spread your fingers apart.

• Do not expose the touch screen to excessive physical shock. You might

damage the touch sensor.

Basic Functions 27

• A touch screen failure may occur if you use the device near a magnetic,

metallic or conductive material.

• If you use the device under bright lights, such as direct sunlight, the

screen may not be visible, depending on your position. Use the device in a shady location or a location with an ambient light that is not too bright and bright enough to read books.

• Do not press the screen with excessive force.

• Gently tap with your fingertip on the desired option.

• Touch control may not work properly if you tap while wearing a glove or

by using the tip of your fingernail.

• Touch control may not work properly if the screen is moist or wet.

• The touch screen may not function properly if a screen-protective film

or accessory purchased from a third party store is attached to the device.

• Displaying a static image for extended periods of time may result in

after-images or screen burn-in. Turn off the screen or avoid displaying the same image for a long time when you do not use the device.

Basic Functions 28

+ 136 hidden pages

LG LM-K400AM User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual