OK, thanks. My wife has just bought a cheap Nokia 103 (she's used Nokias for ages) and I was surprised that it had Bluetooth. It showed up on the laptop I was using at the time, but I couldn't find any way to connect to it. (They didn't pair.)
I checked and it did have Bluetooth on the Nokia 103 menu.
I checked and it did have Bluetooth on the Nokia 103 menu.