PLease dont tell eny one your Mobile IMEI number beacuse any one can do Block ur set from OPerator and after that ur set is not better than a piece of Iron/Plastic.
Because at Operator side they define that this is a stolen set IMEI so dont offer services to this number and after that u better know what will be the scenario.
IMEI is International Mobile Equipment Identity and unique for handsets in World it comes in result of *#06#
So please be aware of it