To track a lost mobile follow below given steps. 1. Open the CEIR official website (ceir.sancharsaathi.gov.in) 2. Click on Block/Track lost or stolen mobile. 3. Enter all required details such as IMEI number, contact details, and other required information. 4. Afer fill all details verify via OTP confirm declaratio and click on submit. 5. Now you will recieved tracking number which you can use for track status of lost/stolen phone.