I had the same problem with my cordless phones, Barra. I take it you have the main phone with additional handsets. When I unplugged one of my handsets my phones went dead as well. You have to set them up again via the main base station. Once the handsets are recognised, they will be OK. I have a philips onis set and I had to unplug the base station and plug it back in again, redo the code and all will be fine.