Welcome to the Forums @Cc19.
As you mentioned, this is happening because the Stylo 4 is not part of the supported devices list. This means that the app has not been fully optimized to work with that phone.
As long as it fulfills the minimum requirements, Android 4.4 and Bluetooth 4.0, there is a possibility that it can work but we cannot guarantee it. You can find the steps to run the set up in this help article.
Let me know if you have any further questions.
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