A free app for Android, by ATT Services Inc..

You cannot use other carriers to your mobile device if you get it preloaded from your current telco company. If you want to use another carrier to your device, this tool can be handy.

This app is designed for AT&T Prepaid customers who own devices that come preloaded with the AT&T Unlock app. The app provides these customers with the ability to unlock their device per the terms of service. Unlocking your device with this app is easy and straightforward – simply follow the on-screen instructions. You can be sure that your information is safe and secure when you unlock your device with this app, because it’s handled by AT&T.

This application is compatible with most devices such as Alcatel, AT&T Maesto and Radiant Core, LG, Nokia, and Samsung.