Q : I cannot turn on Wi-Fi on my Gear S3 when connected to mobile device via Bluetooth.
You can connect the Gear S3 device to a Wi-Fi network to use the Internet or share media files with other
devices. But, please note this feature is only available when the Gear S3 is not connected to the mobile device via Bluetooth that you would normally be connected to via Gear Manager app.
When the Gear S3 is connected via Bluetooth to a Mobile device, the Wi-Fi network connection on the Gear S3 is no longer necessary because Gear S3 will use the data network of the connected mobile device.
As a result, having the Gear S3 connected to a Wi-Fi network in addition to being connected to a Mobile device via Bluetooth would simply lead to increased battery consumption.
Hence, this is why Wi-Fi on the Gear S3 is disabled when connected to a mobile device.
Related Model Information
SM-R760NDAAXSG, SM-R760XDAAXSG, SM-R770NZSAXSG, SM-R770XZSAXSG