Select Menu > Settings and Connectivity > Bluetooth.
When you are not using Bluetooth connectivity, to control who can find your device
and connect to it, select Bluetooth > Off or My phone's visibility > Hidden.
Deactivating Bluetooth connectivity does not affect other functions of the device.
Do not pair with or accept connection requests from an unknown device. This helps
to protect your device from harmful content. Operating the device in hidden mode
is a safer way to avoid malicious software.