Device help

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

AT&T Navigator

Get directions and navigation using AT&T Navigator.

Browse The Web

Browse the web, manage browser tabs, and bookmarks.

Browser Options

Access browser settings to clear history, set homepage, adjust text size, manage pop-up, change the default browser, and restore default settings.

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.

Backup & Restore with a Computer

Backup and restore your device with a computer.

Backup & Restore with Memory Card

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

Battery Life

Tips and tricks to extend your battery performance.

Charge the Battery

Tips on charging your battery.

Block or Unblock Calls

Block or unblock calls from your device.

Caller ID

Show or hide your caller ID when making calls.

Call Forwarding

Manage call forwarding from your device.

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.

In-call Options

Learn what features are available while on an active call.

Make & Receive a Call

Place, receive, and reject a call.

Make & receive a video call

Make or receive a video call.

Speed Dial

Use speed dial and manage speed dial contacts.

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.

Connect to AT&T Microcell

Connect your device to the AT&T MicroCell.

Mobile Hotspot

Set up your device as a mobile hotspot and share your data connection with Wi-Fi-capable devices.

NFC

Use NFC to share content such as photos and contacts between compatible devices.

Signal & cellular data

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

Wi-Fi

Connect your device to a Wi-Fi network.

Action center

Check notifications and alerts, change settings, and more.

Activate New AT&T Prepaid® Service

Learn how to activate new AT&T Prepaid service and plan.

Specifications

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

Add apps to home screen

Add apps, shortcuts, & widgets to your home screen

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 having done a factory reset.

Gestures & Navigation

Control your device by making specific movements with your hand.

Keyboard & Typing

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

Learn and Customize the Home Screen

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

Manage AT&T PREPAID Account

Change your AT&T PREPAID plan, check your balance, add money to your account and more.

Microsoft account sign-in

Sign in using your Microsoft account to access Xbox LIVE, Windows Phone Store, 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.

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.

Messaging settings

Change text (SMS), picture (MMS), emergency, and amber alert settings.

Send & Receive Emails

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 your Exchange email 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.

Activate New AT&T Prepaid® Service

Learn how to activate new AT&T Prepaid service and plan.

Screen Projecting

Project photos, videos, and media on your device to another device (TV, tablet, computer, etc.).

Calendar

Access the calendar and manage events.

Cortana

How to set up and use Cortana, a personal assistant that provides help whenever you need it.

Camera & Video Settings

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

Play music

Play music, turn the music player off.

Take a Picture or Video

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

Transfer Media to & From a Computer

Transfer files to or from your device and a computer.

View & Share Photos or Videos

Access, view, and share your photos and videos.

Anti-Theft

Set up your device so you can remotely locate and control.

Secure My Device

Lock the device screen, set and change security lock, and locate device.

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.

Available Memory

Check the available device storage.

Find IMEI & Serial Number

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

Software update for the Microsoft Lumia 640

Learn how to update the software of the Microsoft Lumia 640.

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.

Reset Device

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

Access Voicemail

Check your voicemail messages.

Change or Reset Voicemail Password

Reset a forgotten password or change an existing voicemail password.

Manage voicemail settings and 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.

Having device issues?

Fix common service and device problems.