If you get the "Your device isn't compatible with this version" message, it usually means that there is a problem with Google Play Services or Google Play Store on your device. This can often be solved by:
Updating Google Play Services on your device
Clearing the data and cache of Google Play Services
Clearing the data and cache of Google Play Store.
You can find instructions and advice on other troubleshooting steps in the following articles:
Google support
Guiding Tech