You’d have to check compatibility of the device your wanting to pair.
The Samsung Gear s2 watches work best when paired with the Gear App from the Playstore.
That said going from a Google Search it looks possible to pair with other Android phones.
Daily Driver > Samsung Galaxy s²³ Ultra 512Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "