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Access browser settings to clear history, set homepage, adjust text size, manage pop-up, change the default browser, and restore default settings.
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.
View cellular network signal, turn international roaming or your mobile data connection on or off.
Learn how to activate an AT&T Prepaid account on your device, online, or over the phone.
Get tips on the best way to keep your device clean.
Add shortcuts and widgets, access the notification panel, changing wallpaper, and more.
Change your AT&T PREPAID plan, check your balance, add money to your account 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.
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 your Exchange email account to sync email, contacts, calendar, and notes to your device.
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.
Learn how to update the software of the Microsoft Lumia 640.
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.