[Resolved]  LG Mobile Km335 Model — invalid IMEI

sir
i pinku singh purchased a mobile phone of LG mobile(model no KM335).
the IMEI no shown in my mobile is [protected], but my n/w operator airtel says that it has a invalid IMEI no.my mobile dead from 1stdec. so why company LG selling an invalid IMEI mobile phone.what is the funda/strategy behind that. and how i resolve this problem for start my phone. we have origional bill/reciept of mobileshop from where i purchased mobile.plz help me

regards
pinku singh