New doorbell pro setup mode?

I've got a stick up camera which works well on my Android app & Echo.Today I installed a doorbell pro, wired type with the supplied UK adapter.It has powered up and now has a blue ring lit up with top left blinking. I have tried to enter setup mode pressing the button on the right side. I have tried to hard reset pressing it for 30 seconds. After an initial white flash it just returns to the blinking blue again.It's brand new and I can't connect to my network.Is this a dud, or am I missing something ?