This purchase was a replacement for one of the 4 handsets we bought many years ago.
Arrived in a plain package and NO instructions.
On plugging in the base the handset asks, ney demands
registration, once scrolled to this particular part on the handset, it then asks for a pin.
No instructions - no pin.
Luckily, we had retained the original instructions.
The pin is 0000 (unless you've changed it) and the helpline for BT is 0800 145 6789 where
they are very helpful.
We recommend the system as reliable - but watch the batteries even rechargables become exhausted
over time. Main advice - keep the origional instructions!