Surface Duo (1st Gen) features - Microsoft Support
https://support.microsoft.com/en-us/surface/surface-duo-1st-gen-features-13f2bba9-2b5d-8802-b021-abf26539eef8
WebSurface Duo combines the Google Android TM operating system with the best Microsoft 365 apps—including apps like Microsoft Office, Outlook, Microsoft Teams, OneDrive, Microsoft Edge, and more. Since it runs on Android, you can download any other apps and games you want from the Google Play Store.
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