Device help
Explore tutorials and more for your device.
Want to get to know your device a litte better? Explore features, find out how to keep it safe, and more.
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Learn more about your Samsung Galaxy Express 3 (J120A)
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Make and receive high-definition voice calls (Clear conversations and reduced background noise)
Block or unblock calls from your device.
Manage call forwarding from your device.
Show or hide your caller ID when making calls.
Add another person to your call, merge calls, place someone on hold and more.
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.
Start a flow to troubleshoot phone call issues.
Learn what features are available while on an active call.
Place, receive, and reject a call.
Use speed dial and manage speed dial contacts.
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Turn Airplane mode on and off.
Turn Bluetooth on or off, scan and connect to other Bluetooth devices, and unpair a connected device.
Start a flow to troubleshoot Bluetooth issues.
Start a flow to troubleshoot hotspots issues.
Start a flow to troubleshoot internet issues.
Start a flow to troubleshoot Wi-Fi issues.
Set up your device as a personal hotspot and share your data connection with Wi-Fi-capable devices.
View cellular network signal, turn international roaming or your mobile data connection on or off.
How to connect to a Wi-Fi network.
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This tutorial shows how to activate an ATnT PREPAID account.
Determine your device's SIM card type, operating frequencies, physical characteristics, storage, and more.
Get tips on the best way to keep your device clean.
Set up your device for the first time or after having done a factory reset.
Control your device by making specific movements with your hand.
Add your Google account to sync Gmail, Chrome, YouTube, Google Maps, and more.
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.
Change your ATnT PREPAID plan, check your balance, add money to your account and more.
Install and remove the SIM and battery.
Turn your device on and off.
Perform a text and voice search on your device and how to adjust search settings.
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Check the available device storage.
View the device IMEI, phone, SIM (ICCID) and serial number.
Start a flow to troubleshoot software update issues.
Android phones have a feature called Safe Mode, which can help you rule out problematic apps as the cause of your device problems.
Learn how to update the software of the Samsung Galaxy Express 3 (J120A).
Determine your current device software version and check for updates.
Access Usage Manager to view data usage, set data limits, and see the apps using the most data.
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Free apps typically get revenue through ads, pop-ups, or notifications. Learn how to manage these on your device.
Use application manager to improve your app and device performance.
Fix contacts and photos issues
Start a flow to troubleshoot contacts or photos issues.
Start a flow to troubleshoot internet issues.
Start a flow to troubleshoot messaging issues.
Start a flow to troubleshoot phone call issues.
Start a flow to troubleshoot power and battery issues.
Start a flow to troubleshoot screen issues.
Start a flow to troubleshoot SIM card issues.
Start a flow to troubleshoot voicemail issues.
Perform a soft, factory, and alternate master reset of the device.
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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Check your voicemail messages.
Change or reset voicemail password
Reset a forgotten password or change an existing voicemail password.
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 on your device.
More Topics
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Browse the web, manage browser tabs, and bookmarks.
Download apps, games, movies, music, books, magazine, newspapers and more.
Remove an icon from your home screen and delete apps from your device.
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 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.
Transfer your data and apps from your old device to your new one
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Tips and tricks to extend your battery performance.
Tips on charging your battery.
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Block messages from your device.
Manage email settings such as sync frequency, server settings, signature, deleting an email account, and more.
Start a flow to troubleshoot email issues.
Start a flow to troubleshoot messaging issues.
Change text (SMS), picture (MMS), emergency, and AMBER alert settings.
Add and download email attachments, respond to an email and more.
Create and respond to text (SMS) or picture (MMS) messages, add, save, and view received attachments and more.
Add an Exchange account to sync email, contacts, calendar, and notes to your device.
Add your personal email account to sync email, contacts, calendar, and notes to your device.
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Use voice commands to control your device and access voice control settings.
Access the calendar and manage events.
This tutorial shows how to access and use the DIRECTV app if your are a DIRECTV subscriber.
All of HBO together with new hits, classic favorites, plus new Max Originals.
Photos, videos, and media
Look at photos, watch videos, listen to songs, and more in just a few taps.
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Manage camera and video settings including flash, timer, voice control, recording mode, storage location, and more.
Start a flow to troubleshoot audio issues.
Start a flow to troubleshoot camera issues.
Play music, turn the music player off.
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.
Access, view, and share your photos and videos.
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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
Remotely manage your device securely using Find My Mobile.
Reset a forgotten pattern lock.
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.
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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Turn on features such as TalkBack, Hearing aid mode, and more.
Set the date and time.
Change the display time out, brightness and orientation.
Change volume settings, ringtones, and notification alerts.