Recently it became known that Google Messages ("Messages") will stop working on non-certified
That Google Duo will stop working onsome devices, it became known from the application code. On uncertified smartphones, the user's Google Duo account will be disabled, but he will be able to download the entire call history before his 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.