Device help
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Browse device topics
ARTICLES
Browse the web, add bookmarks, and access browser settings to clear history and block or unblock pop-ups.
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.
ARTICLES
Move contacts, messages, music, and other data to your new device using ATnT Mobile Transfer.
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.
ARTICLES
Tips and tricks to extend your battery performance.
Tips on charging your battery.
ARTICLES
Block or unblock calls from your device.
Manage call forwarding from your device.
Add, view, delete, and customize contacts by adding a picture or ringtone.
Learn what features are available while on an active call.
Place, receive, and reject a call.
ARTICLES
Turn Airplane mode on and off.
Turn Bluetooth on or off, scan and connect to other Bluetooth devices, and unpair a connected device.
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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Get tips on the best way to keep your device clean.
Set up your device for the first time or after a factory reset, use Setup n Transfer and enable Easy Mode.
Control your device by making specific movements with your hand.
Add your Google account to access Gmail and the Play Store, receive personalized Google search results, and automatically log in for all other Google-based services on your device.
Install and remove the SIM and memory card (MicroSD).
Keyboard functions, Auto-complete, Swype, Copy n Paste and Keyboard settings.
Learn & customize the home screen
Make changes to wallpaper, themes, home screen panels, folders and screen grid.
Turn your device on and off.
Determine your device's SIM card type, operating frequencies, physical characteristics, storage, and more.
ARTICLES
View text and picture messages, calls, and voicemail messages in a single inbox. Send and receive messages from your tablet or computer.
Block messages from your device.
Manage email settings such as sync frequency, server settings, signature, deleting an email account, and more.
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 your email accounts so you can read and send email on your device.
ARTICLES
Use voice commands to control your device and access voice control settings.
Get social network updates, news, and more on HTC BlinkFeed
Access the calendar to create, edit and delete events.
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.
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.
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Set up your device so you can remotely locate and control.
AT&T Mobile Security & Call Protect
Find out how our apps can help keep your mobile data secure and prevent fraud and nuisance calls.
Reset a forgotten pattern lock.
Lock or unlock your display, set a screen security lock type (pin, password, or pattern), get your PUK code, or request your device be unlocked from the ATnT network.
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Turn on features such as Voice Assistant, Flash Notifications, and more.
Set the date and time and use the alarm clock.
Change the display time out, brightness and orientation.
Change volume settings, ringtones, and notification alerts.
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Check the available device storage.
View the device IMEI, phone, and serial number.
Learn how to update the software of the HTC One M9 (0PJA110).
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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Use application manager to improve your app and device performance.
Perform a soft, factory, and alternate master reset of the device.
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Check your voicemail messages.
Change or reset voicemail password
Reset a forgotten password or change an existing voicemail password.
Manage voicemail settings & security
Learn how to manage your voicemail, including recording a personal greeting and changing your password.
Set up voicemail, check messages, and change or reset password.
Fix common service and device problems.