Sony Ericsson w200i

I Sanjeev Khare,I have lost my mobile Model Sony Ericsson w200i, IMEI:35426901-791180-4, on dated 26/09/2007 at 11.00 am in Patna, Bihar, India. Could you please trace the mobile where it is & who is picked up phone ? I have purchased on dt. 22/09/2007.