You should mention the following details in the mail
- IMEI No. of the lost Handset
- The exact place where you think the handset was lost or Theft
- The exact time and Date of incident
- The last used SIM(the number) on the lost phone
- Last received and outgoing call detail(Number and time)
- Your Complete contact information(Address,Landline and Mobile number for the police to contact you)
- Don't forget to attach the copy of FIR or Petition Acknowledgment Letter in the mail