AT&T's free iPhone app gives small business owners better mobile access to the files in their AT&T Backup and Go accounts. The Backup and Go service, which is part of AT&T Tech Support 360, provides remote backup of files on Windows and Mac desktop and notebook systems, for unlimited amounts of internal drives (but not external drives or devices). According to the company, backup is continuous and is performed each time a file is changed or saved. Files on the remote service can be accessed using a browser. According to the company, the mobile app "uses an enhanced user interface that integrates seamlessly with smartphones and can display 52 of the most common file types. Previously, smartphones were limited to browser-based access to the Backup and Go service."