IPhone :: Manually Add The IMEI Number To ICloud Account?

A friend forgot his phone in the bus on his departure. He called ma immediately from the airport informing me about the same, so I called the bus company...and certainly "there was no phone". I went today to the police to report it, so they could track it down, however I was told by the police guy, that as far as it was basically lost, despite that it was lost on the bus and from there it just "vanished", they will not search for the same. He was telling me that I should claim it back from insurance if I did one...if it would be only the phone is one thing, but there were the pictures of the trip and quite some other personal datas, so it is more becuase of that.

The phone was purchased just before the visit, and the friend did not register it through "Find my phone". I was told today that I can enter manually the IMEI and search for location of the phone, as I am pretty sure that the phone is still in the country.

Info:
iPhone 4