Is it possible to connect my Galaxy Watch Active2 to a non-Galaxy smartphone?

For Non-Samsung mobile devices, the Watch Active2 can work with 

• Android Smartphones that have Android OS  5.0(L OS) or higher, RAM 1.5GB above
• i OS : iPhone 5 and above and  iOS 9.0 or above

When connected with Non-Samsung mobile devices, some features created by each manufacturer may have limited support(ex. Call,  Message, e-mail, Schedule, Alarm, Music Player etc.) and some features are only available on Samsung smartphones. (ex. Samsung pay etc.)

Supported devices vary depending on your region, operator and device brand. Supported list is subject to change.