Samsung Galaxy Express 3 (J120A)

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Explore tutorials and more for your device.
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Samsung Galaxy Express 3 (J120A)

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Fix common service and device issues.

Learn all about your device

Want to get to know your device a litte better? Explore features, find out how to keep it safe, and more.

Learn more about your Samsung Galaxy Express 3 (J120A)

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AT&T HD Voice

Make and receive high-definition voice calls (Clear conversations and reduced background noise)

Block calls

Block or unblock calls from your device.

Call forwarding

Manage call forwarding from your device.

Caller ID

Show or hide your caller ID when making calls.

Conference calling

Add another person to your call, merge calls, place someone on hold and more.

Contacts

Add, view, delete, and customize contacts by adding a picture or ringtone.

Fix call forwarding or caller id issues

Start a flow to troubleshoot call forwarding or caller ID issues.

Fix phone call issues

Start a flow to troubleshoot phone call issues.

In-call options

Learn what features are available while on an active call.

Make & receive a call

Place, receive, and reject a call.

Speed dial

Use speed dial and manage speed dial contacts.

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Airplane mode

Turn Airplane mode on and off.

Bluetooth

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

Fix Bluetooth issues

Start a flow to troubleshoot Bluetooth issues.

Fix hotspot issues

Start a flow to troubleshoot hotspots issues.

Fix Internet issues

Start a flow to troubleshoot internet issues.

Fix Wi-Fi issues

Start a flow to troubleshoot Wi-Fi issues.

Mobile hotspot

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 international roaming or your mobile data connection on or off.

Wi-Fi

How to connect to a Wi-Fi network.

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Activate AT&T PREPAID account

This tutorial shows how to activate an ATnT PREPAID account.

Specifications

Determine your device's SIM card type, operating frequencies, physical characteristics, storage, and more.

Cleaning 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 having done a factory reset.

Gestures & navigation

Control your device by making specific movements with your hand.

Google sign-in

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

Keyboard & typing

Cut and paste, use speech-to-text, and access keyboard settings.

Learn & customize the home screen

Add shortcuts and widgets, access the notification panel, changing wallpaper, and more.

Manage AT&T PREPAID account

Change your ATnT PREPAID plan, check your balance, add money to your account and more.

Phone assembly

Install and remove the SIM and battery.

Power device on or off

Turn your device on and off.

Search

Perform a text and voice search on your device and how to adjust search settings.

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Available memory

Check the available device storage.

Find IMEI & serial number

View the device IMEI, phone, SIM (ICCID) and serial number.

Fix software update issues

Start a flow to troubleshoot software update issues.

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

Learn how to update the software of the Samsung Galaxy Express 3 (J120A).

Software version

Determine your current device software version and check for updates.

View & manage data

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

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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

Use application manager to improve your app and device performance.

Fix contacts and photos issues

Start a flow to troubleshoot contacts or photos issues.

Fix Internet issues

Start a flow to troubleshoot internet issues.

Fix messaging issues

Start a flow to troubleshoot messaging issues.

Fix phone call issues

Start a flow to troubleshoot phone call issues.

Fix power and battery issues

Start a flow to troubleshoot power and battery issues.

Fix screen issues

Start a flow to troubleshoot screen issues.

Fix SIM card issues

Start a flow to troubleshoot SIM card issues.

Fix voicemail issues

Start a flow to troubleshoot voicemail issues.

Reset device

Perform a soft, factory, and alternate master reset of the 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.

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Access voicemail

Check your voicemail messages.

Change or reset voicemail password

Reset a forgotten password or change an existing voicemail password.

Fix voicemail issues

Start a flow to troubleshoot voicemail issues.

Manage voicemail settings & security

Learn how to manage your voicemail, including recording a personal greeting and changing your password.

Set up voicemail

Set up voicemail on your device.

More Topics

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Browse the Web

Browse the web, manage browser tabs, and bookmarks.

Download apps & games

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

Remove an app

Remove an icon from your home screen and delete apps from your device.

View or close running apps

How to view, switch between, and close running applications.

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Backup & restore with computer

Backup and restore your device with a computer.

Backup & restore with Google

Backup Google account data in the event you have to replace or reset your device so you can restore later.

Backup & restore with memory card

Backup contacts, photos, and files to increase device memory or transfer to another device.

Fix backup, sync, restore, or transfer issues

Start a flow to troubleshoot backup, sync, restore or transfer issues.

Samsung Smart Switch Mobile

Transfer your data and apps from your old device to your new one

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Battery life

Tips and tricks to extend your battery performance.

Charge the battery

Tips on charging your battery.

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Block messages

Block messages from your device.

Email settings

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

Fix email issues

Start a flow to troubleshoot email issues.

Fix messaging issues

Start a flow to troubleshoot messaging issues.

Messaging settings

Change text (SMS), picture (MMS), emergency, and 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) or picture (MMS) messages, add, save, and view received attachments and more.

Set up corporate email

Add an Exchange account to sync email, contacts, calendar, and notes to your device.

Set up personal email

Add your personal email account to sync email, contacts, calendar, and notes to your device.

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Voice control

Use voice commands to control your device and access voice control settings.

Calendar

Access the calendar and manage events.

DIRECTV app

This tutorial shows how to access and use the DIRECTV app if your are a DIRECTV subscriber.

HBO Max

All of HBO together with new hits, classic favorites, plus new Max Originals.

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Camera & video settings

Manage camera and video settings including flash, timer, voice control, recording mode, storage location, and more.

Fix audio issues

Start a flow to troubleshoot audio issues.

Fix camera issues

Start a flow to troubleshoot camera issues.

Play music

Play music, turn the music player off.

Take a picture or video

Take and edit a picture or video, use the front and rear camera, and switch between camera and video modes.

Transfer media to & from computer

Transfer files to or from your device and a computer.

View & share photos or videos

Access, view, and share your photos and videos.

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Ads, pop-ups & notifications

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

AT&T Mobile Security & Call Protect

Find out how our apps can help keep your mobile data secure and prevent fraud and nuisance calls

Find My Mobile

Remotely manage your device securely using Find My Mobile.

Reset pattern lock

Reset a forgotten pattern lock.

Secure my device

Lock or unlock your display, set a screen security lock type (pin, password, pattern, or fingerprint), get your PUK code, or request your device be unlocked from the ATnT 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.

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Accessibility

Turn on features such as TalkBack, Hearing aid mode, and more.

Date & time

Set the date and time.

Display

Change the display time out, brightness and orientation.

Sounds & alerts

Change volume settings, ringtones, and notification alerts.

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