Device help

Get step-by-step help and info for your device.

Access Downloaded Files

Access files downloaded from a web browser, email, and messages.

Browse the Web

Access the web, access or edit bookmarks, access tabs, and access browser settings.

Download Apps & Games

Download apps, games, movies, music, books, magazines, newspapers and more.

Back up & Restore with Google

Discover how to use Google to back up contacts, photos, and files.

Find My Mobile

Learn how you can help protect your phone from unauthorized use if it has been lost, stolen, or reset to factory settings without your permission.

Insert or Remove SIM & Memory Card

Get instructions about how to install or remove a SIM or memory card for your device.

Reset Device

Learn how to perform a soft, factory, or alternate master reset of your device.

AT&T Personal Cloud

Use AT&T Personal Cloud to back up and sync your contacts, photos, videos, and more from your device to the cloud.

Available Storage

Learn how to check available device storage, free up memory, remove unused apps, or clear app data.

Back up & Restore with a Computer

Learn how to back up and restore your device using a computer.

Backup & Restore with a Memory Card

Find out how back up contacts, photos, and files with a memory card to increase device memory or transfer to another device.

Back up & Restore with Google

Discover how to use Google to back up contacts, photos, and files.

Airplane Mode

Learn how to turn Airplane Mode on and off using the Notification bar or through Settings.

Optimize Battery Life

Tips and tricks to extend your battery performance.

Display

Change the display brightness, time out and orientation.

Block or Unblock Calls

Block or unblock calls from your device. Block anonymous calls.

Call Features

Get familiar with in-call options, including muting and speakerphone, as well as advanced call features, such as creating a conference call.

Call Forwarding

Manage call forwarding from your device.

Contacts

Learn how to add, view, delete, customize by adding a picture or ringtone, and back up your contacts.

Make & Receive an AT&T Video Call

AT&T Video Call lets you make and receive HD Voice calls combined with real-time video.

Wi-Fi Calling

Use your Wi-Fi connection to talk and text when cellular coverage is limited or unavailable.

Airplane Mode

Learn how to turn Airplane Mode on and off using the Notification bar or through Settings.

Bluetooth

Learn how to turn Bluetooth on or off, scan and connect to other Bluetooth devices, and unpair a connected device.

Mobile Hotspot

Learn how to set up your device as a personal hotspot and share your data connection with Wi-Fi-capable devices.

Signal & Cellular Data

View cellular network signal, turn cellular data connection, international roaming, and mobile data connection on or off.

Wi-Fi

Learn how to turn Wi-Fi on or off, connect to a Wi-Fi network, and remove a Wi-Fi network.

Specifications

Determine your device's SIM card type, operating frequencies, physical characteristics, storage, charge and use times, and battery information.

Learn How to Clean Your Device

Get tips on the best way to keep your device clean.

Device Setup

Set up your device for the first time or after performing a factory reset.

Find IMEI, Phone & Serial Number

Learn how locate your device's IMEI, serial number, and phone number.

Gestures & Motions

How to use air gestures and motions as well as access additional motions and gestures.

Google Sign-In

Add your Google account to sync Gmail, Chrome, YouTube, Google Maps, and more.

Insert or Remove SIM & Memory Card

Get instructions about how to install or remove a SIM or memory card for your device.

Keyboard & Typing

Access keyboard settings, use Swype, auto-complete suggestions, emojis, speech-to-text, and one-handed operation.

Learn & Customize the Home Screen

Make changes to apps, widgets, folders, wallpapers, home screen panels, screen grid, and home touch buttons.

AT&T Messages Backup & Sync

View text and picture messages, calls, and voicemail messages in a single inbox. Send and receive messages from your tablet or computer.

Block or Unblock Messages

Learn how to block and unblock messages.

Contacts

Learn how to add, view, delete, customize by adding a picture or ringtone, and back up your contacts.

Email Settings

Manage email settings such as sync frequency, server settings, signature, removing an email account, and more.

Messaging Settings

Manage messaging settings such as notification alerts, Advanced Messaging, message limits, restore default settings, and emergency/AMBER alert settings.

Send & Receive Email

Add and download email attachments, respond to an email and more.

Send & Receive Messages

Create and respond to text (SMS), Advanced Messaging, or picture (MMS) messages, add, save, and view received attachments and more.

Set Up Email

Learn how to add your email accounts so you can read and send email on your device.

Insert or Remove SIM & Memory Card

Get instructions about how to install or remove a SIM or memory card for your device.

AT&T Personal Cloud

Use AT&T Personal Cloud to back up and sync your contacts, photos, videos, and more from your device to the cloud.

Back up & Restore with Google

Discover how to use Google to back up contacts, photos, and files.

Back up & Restore with a Computer

Learn how to back up and restore your device using a computer.

myAT&T

View and pay your AT&T bills online, manage your account, reset passwords, or upgrade your AT&T services.

QSlide

QSlide allows you to multitask efficiently with the ability to open two additional windows over your main screen, and adjust their window size and transparency.

QuickMemo+

Create memos with text, drawings, images, video, reminders, and more using QuickMemo+.

Screen Sharing

Discover how to project photos, videos, and media on your device to a TV, tablet, computer, or other device.

Browse the Web

Access the web, access or edit bookmarks, access tabs, and access browser settings.

Calendar

Access the calendar on your device and learn how to manage events.

Capture+

Learn how to use Capture+, which allows you to capture and draw on screenshots, create and schedule memos, and more.

Comfort View

Learn how to enable and adjust Comfort view in order to reduce eyestrain from blue light on the screen.

Split Screen

Learn how to use Multi Window, which allows you to have multiple apps open at the same time.

Floating Bar

The Floating Bar function can display app icons, web tabs, notifications, contacts, useful information, and more.

Google Assistant

Learn how Google Assistant allows you to control your device and access voice control settings using voice commands.

Access, Store Photos & Videos

Learn how to access and store photos & videos.

Advanced Photo & Video Features

Learn how to access and use Camera modes, effects, customization, and crop a photo.

AT&T Personal Cloud

Use AT&T Personal Cloud to back up and sync your contacts, photos, videos, and more from your device to the cloud.

Camera & Video Settings

Manage camera and video settings including picture size, timer, voice control, and flash.

Camera Modes

Learn what camera modes are available on your device and what each mode does.

Take A Picture

Learn how to take a picture, switch between front and rear camera, focus, and zoom.

Take a Screenshot

Learn how to take and access screenshots.

Take A Video

Learn how to record a video, capture images during video recording, and more.

Transfer Photos & Videos

Learn how to transfer photos and videos to or from your device and a computer.

Ads, Pop-ups & Notifications

Free apps typically get revenue through ads, pop-ups, or notifications. Learn how to manage these on your device.

Find My Mobile

Learn how you can help protect your phone from unauthorized use if it has been lost, stolen, or reset to factory settings without your permission.

Secure My Device

Learn how to lock or unlock your display, set a screen security lock type (intelligent scan, face, iris, fingerprint, pin, password, pattern, or swipe), get your PUK code, or request your device be unlocked from the AT&T network.

Viruses & Malware

Learn how to determine if you might have harmful software (malware) on your device and get tips to help fix the issue.

Accessibility

Accessibility features improve the usability of your device for users with impaired vision or hearing, cognitive difficulty, or reduced dexterity.

Date, Time & Alarm

Learn how to set the date and time on your device as well as use the alarm clock.

Display

Change the display brightness, time out and orientation.

Notifications & Alerts

Learn how to access and adjust notification settings, turn notifications on or off, and more.

Sounds

Change volume settings, ringtones, notification alerts, and use Do not disturb mode.

Available Storage

Learn how to check available device storage, free up memory, remove unused apps, or clear app data.

Find IMEI, Phone & Serial Number

Learn how locate your device's IMEI, serial number, and phone number.

Reset Device

Learn how to perform a soft, factory, or alternate master reset of your device.

Safe Mode

Android phones have a feature called Safe Mode, which can help you rule out problematic apps as the cause of your device problems.

Software update for the LG V40 ThinQ (LM-V405UA)

Learn how to update the software of the LG V40 ThinQ (LM-V405UA).

Software Version

Determine your current device software version and check for updates.

View & Manage Data

Access Usage Manager to view data usage, see the apps using the most data, and set data limits.

Ads, Pop-ups & Notifications

Free apps typically get revenue through ads, pop-ups, or notifications. Learn how to manage these on your device.

App Troubleshooting

Learn how to troubleshoot apps by clearing the app cache, force stopping an app, checking for updates, removing an app, and reinstalling.

Reset Device

Learn how to perform a soft, factory, or alternate master reset of your device.

Safe Mode

Android phones have a feature called Safe Mode, which can help you rule out problematic apps as the cause of your device problems.

Access Voicemail

Access voicemail, check voicemail messages, and view voicemail options.

Change or Reset Voicemail Password

Reset a forgotten password or change an existing voicemail password.

Set Up Voicemail

Set up voicemail.

Having device issues?

Fix common service and device problems.