go to the phone base where you charge the phone and hold down the button on the side untill it beeps keep your finger on the button, then press prog on phone go to register and select the base of the handset your main base would be base 1 and your next 2 etc up to a max of 4 phones type in the pin which is 0000 press green ok button and it should work
karl
March 2010
i just fixed the same problem with mine .. go to http://docs.google.com/gview?a=v&attid=0.1&thid=1201015de01b69c6&mt=application/pdf (or see instruction manual) and follow steps on section 11 .. its very straight forward and takes about 30 seconds to do. good luck
mo.noori (at) gmail.com
March 2009
I can answer this question...
my tesco ARC202 Cordless phone is locked with unregister in the display box?