Samsung Galaxy Tab S User Manual page 90

Delete a Paired Device (Unpairing)
When you unpair from a Bluetooth device, the two
devices will no longer recognize each other. To
connect again, you'd need to pair the devices.
1. From a Home screen, tap Apps > Settings.
2. Tap next to the previously paired device, and
then tap Unpair to delete the paired device.
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Settings Bluetooth