Recently it became known that Google Messages will stop working on non-certified
The fact that Google Duo will stop working onsome devices, it became known from the application code. On non-certified smartphones, the user's Google Duo account will be disabled, but the user will be able to download all call history before their access is revoked.
By an uncertified device, Google means smartphones that have not received permission to use the company's proprietary services.
Google Duo will stop working on April 1, 2021. Users will then have two weeks to download their data from the app.