Phone Remote Companion is an Android plugin developed by SM Software that enables users to remotely control their phone functions via their Samsung Gear smartwatches. To use this app, you need to install the Galaxy Phone Control or Remote Watch for Fit2 app on your smartwatch, and grant all required permissions on your Android 10+ phone.

It's important to note that without granting permissions, you won't be able to control your phone by smartwatch. Also, as Android 10 doesn't allow other apps to read clipboard text, users must manually send text to their watch. Since Android 10, you must also add an extra permission called 'Display Over Other Apps' manually; otherwise, camera preview and taking a photo will not work.

Overall, Phone Remote Companion is a useful plugin for Samsung smartwatch users who want to remotely control their phone functions. However, the setup process and permissions can be a bit confusing for some users.