AT&T Locker is simple and secure cloud storage for the content you care about most. With Locker, you get 50GB of free* cloud storage, so you can easily access your photos, videos, contacts, and more. *Available to AT&T wireless customers. Data rates may apply. SIMPLE • You decide what and how to save. • Easily download and transfer your files. • Automatically restore contacts when you upgrade or change devices. CONVENIENT • Manage your content from your phone, tablet, and computer. • Share just one photo or an entire album. • Save content from your other devices – AT&T Locker works across operating systems too. SECURE • Keep your content secure, even if you lose or replace your device. • AT&T Locker is password-protected, so you’re in control of your content. Requires smartphones with Windows Phone 8 and above. Data rates may apply for app download and usage. Storage amounts subject to change or may be discontinued at any time. Restrictions apply. For complete terms and conditions, see Service for U.S.-based AT&T wireless subscribers only. The collection, use, and disclosure of any personal information through this application are governed by the AT&T Privacy Policy found at NOTE: AT&T Locker is only available for AT&T wireless customers. You must have an AT&T User ID to log in to and use AT&T Locker. An AT&T User ID acts as a universal login to access AT&T Locker and your other AT&T accounts. If you don’t have an AT&T User ID yet, you can create one when you sign up for AT&T Locker from within the AT&T Locker app on your device or on your computer at

Available on

mobile device

mobile device

Version notes

Version number: Varies by device

Thanks for choosing AT&T Locker. We want to hear what you think. Your feedback lets us know what you want to see in Locker. Love your Locker? Rate it 5 stars! New in the latest release: • Back up your contacts – Turn on Contacts Sync to save new contacts in the cloud. • Eliminate duplicate contacts – Use the AT&T Locker website from your computer to import and merge contacts from Google, Yahoo, and more. • Defect fixes If you already have an AT&T Locker account, log in to the new version of Locker with the same AT&T User ID and Password you’ve been using. If you need help, please contact our Customer Care team at

System Requirements

OS Windows 10 Mobile, Windows Phone 8.1, Windows Phone 8
Architecture x86, x64, ARM
OS Windows 10 Mobile, Windows Phone 8.1, Windows Phone 8
Architecture x86, x64, ARM

Additional info

Published by
AT&T Services, Inc.
© 2016 AT&T Intellectual Property

Approximate download size
8.83 MB - 9.11 MB


Use your device network services
Use your music
Use the media items that are currently playing
Use any of your Windows Phone sensors
Access your browser
Use the photos in your media library
Access your Internet connection and act as a server.
Use your music library
Use your video library
Use your pictures library
Use your documents library
Use your contacts

Install on up to ten Windows 10 devices.

Language supported
English (United States)

Ratings and reviews

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Platform: Mobile

Not working currently.

It takes longer to download pictures than to upload them. Not working at all on this device.

3 out of 9 people found this helpful.




Platform: Mobile

App does nothing

It constantly redirect me to the go phone sign in.




Platform: Mobile

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Platform: Mobile

Ever since you upgraded this app, it is a complete nightmare! It used to be a 5, now its a 0! Constantly failing, noisy, irritating, how is this an upgrade??? I waited to write this thinking you were going to work out the kinks, but obviously not! I hate this thing!!! It used to silently & efficiently backup with no problem. Why you felt it should change, idk, but I despise you a little for it.

13 out of 21 people found this helpful.




Platform: Mobile

Wow, what happened? Please bring back the old version.

No background sync. Constant alert in notification center. .. Update, now it keeps logging me out. Why change the app?

8 out of 11 people found this helpful.




Platform: Mobile

It is a two star app!

This app is below okay. The fact that the upload cannot be done in the background makes it useless. There is no progress bar to show the upload process if you click okay on the dialog that opens when you start syncing. Aside from all the glitches and problems, even at its best, it has nothing to offer that OneDrive or Dropbox or Box don't offer.




Platform: Mobile

Great and useful application. Much better than was before

4 out of 18 people found this helpful.




Platform: Mobile

Great app. Could be easier and less counterintuitive.

5 out of 15 people found this helpful.




Platform: Mobile

Constantly hangs and never auto uploads even on strong Wi-Fi. Works well for a few manual uploads...

15 out of 20 people found this helpful.



T Dea

Platform: Mobile

The program is too slow. And it doesn't matter what devices I'm using. The upload is slow. And the download doesn't work at all. It won't share or email files and pictures. So why is it on my systems?

12 out of 15 people found this helpful.



Developer comment · responded on