On July 28, DUO will end support for the DUO Mobile application for iOS 10 and Android 6. Both of these OS versions are not fully supported by Apple and Google. This end of support milestone is not an end of life for the application on devices with these operating systems; push and app-generated passcode authentications will continue to function on installed apps.
However, beginning January 2, 2020, devices running iOS 10, Android 6, or older may no longer be able to install DUO Mobile from the Apple App Store or Google Play Store. This will not affect mobile app authentications for users who have already downloaded the app, authentications will continue to function.
Because SMS-delivered passcodes and phone callback authentication do not rely on the DUO Mobile app, DUO will continue to support these types of authentication for older devices with or without the app.
DUO encourages users to upgrade to the latest OS versions to ensure devices are not vulnerable to security issues and to provide your users with the best DUO Mobile experience.