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Browse device topics
Access browser settings to clear history, set homepage, adjust text size, manage pop-up, change the default browser, and restore default settings.
Move contacts, messages, music, and other data to your new device using ATnT Mobile Transfer.
Backup and restore your device with a computer.
Backup contacts, photos, and files to increase device memory or transfer to another device.
Save files to OneDrive and access them from any device, like your PC, tablet, or phone.
Block or unblock calls from your device.
Make or receive a video call.
Turn Bluetooth on or off, scan and connect to other Bluetooth devices, and unpair a connected device.
Set up your device as a mobile hotspot and share your data connection with Wi-Fi-capable devices.
Use NFC to share content such as photos and contacts between compatible devices.
View cellular network signal, turn international roaming or your mobile data connection on or off.
Add apps, shortcuts, n widgets to your start screen
Get tips on the best way to keep your device clean.
Add shortcuts and widgets, access the notification panel, changing wallpaper, and more.
Sign in using your Microsoft account to access Xbox LIVE, Windows Phone Store, and more.
Manage email settings such as sync frequency, server settings, signature, deleting an email account, and more.
Create and respond to text (SMS) or picture (MMS) messages, add, save, and view received attachments and more.
Look at photos, watch videos, listen to songs, and more in just a few taps.
Manage camera and video settings including flash, timer, voice control, recording mode, storage location, and more.
Take screenshots, edit a picture or video, use the front and rear camera, and switch between camera and video modes.
Transfer files to or from your device and a computer.
View the device IMEI, phone, SIM (ICCID) and serial number.
Learn how to update the software of the Microsoft Lumia 640 XL
Reset a forgotten password or change an existing voicemail password.
Learn how to manage your voicemail, including recording a personal greeting and changing your password.