Samsung SM-S975LZKATFN - Manual (Page 302)

Note: If callers can not hear you during a call while using a paired
Bluetooth headset (with built-in microphone), verify the Call
audio option is enabled within the entry’s Bluetooth Settings
page.
Disconnecting a Paired Bluetooth Device
Disconnecting a paired device breaks the connection between the
device and your phone, but retains the knowledge of the pairing. At a
later point when you wish to reconnect the device, there is no need
to setup the connection information again.
1. Verify your Bluetooth is active.
2. From the Bluetooth settings page, tap the previously paired
device (from the bottom of the page).
3. Tap OK to confirm disconnection.
Note: Disconnections are manually done but often occur automatically
if the paired device goes out of range of your phone or it is
powered off.
Deleting a Paired Bluetooth Device
Deleting a device from your list removes its “connection record” and
upon reconnection would require that you re-enter all the previous
pairing information.
1. Verify Bluetooth is active.
2. From the Bluetooth settings page, tap (Settings) ➔
Unpair to delete the paired device.
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