hey im selling nokia lumia 800 in perfect condition,but phone OS must be rewrited,becouse of passcod ?

hey im selling nokia lumia 800 in perfect condition,but phone OS must be rewrited,becouse of passcode,it costs about 15pounds.Found it about 2-3 months ago.Also phone is locked to orange. Phone has GPS,able connect to tv,3,7inch Gorilla® Glass screen,16gb,512of ram,camera 8.1 MP (3264x2448),dual led-flash,autofocus,processor 1.4 GHz 3D Graphics HW Accelerator.