Apple Iphone 4 Black 16GB Orange Tmobile ?

I am selling my Black Iphone 4, 16 GB locked to Tmobile and Orange. The phone is in great condition and comes with a charger but no box. If you would like to see the phone working please bring an Orange/Tmobile micro sim with you. I am in Westbourne Grove on weekdays beteen 8.45 and 6.00 and Islington N1 from 6.30