I checked the binatone site and I downloaded the manual, and the short answer is to hold down the "#" key to toggle between lock and unlock the phone.
Harry
November 2008
my phones are coming on the screen as range out. how do i fix them
thanks
billy joe
October 2008
Ring 0845 345 9677 Option 2 - very helpful operator will talk you through how to unlock the phone. You can also download full instructions at www.binatoneonline.com
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cordless phones.