Police officers will not lodge a first information report (FIR) upon receiving information about the loss of a mobile phone. It is not a cognisable offence hence, FIR is not permissible under Section 154 of the code of criminal procedure.
In this situation the police officer shall record the substance of information in the general diary and the informant has to approach the court under Section 155 crpc for direction of investigation. On receiving the direction of the court the police will investigate the case.
During the investigation the police officer (investigating officer) will put your mobile’s IMEI number on the electronic surveillance to trace the current location. An IMEI stands for International Mobile Equipment Identity and it is an unique identification number.