The compatibility of the Huawei Watch GT 4 with Samsung smartphones is possible, but not always flawless.

- The Huawei Watch GT 4 is compatible with Android smartphones, including those from Samsung, provided the Samsung smartphone is running Android 6.0 or later.
- The connection and basic functions such as notifications, fitness data synchronisation and Bluetooth calls work generally, but there are some limitations:
- When used with a non-Huawei Android phone, such as a Samsung phone, setting up and using the full functionality of the smartwatch can be more complicated. For example, notifications can be received but not interacted with.
- Some specific functions such as MeeTime and HUAWEI Share OneHop are only available with Huawei phones running EMUI 11.0 or later.

Overall, the Huawei Watch GT 4 works with Samsung smartphones, but the experience is more optimised when using a Huawei phone.