FLY B430 — Invalid Sim - Vodafone

I have bought a mobile Fly B430

(IMEI number [protected] & [protected]) from Shreeji Fones Thane, Maharastra.
I bought it on 21/01/2010, after 02/02/2010 evening my service provider Vodafone blocked my sim on this handset stating invalid sim. while Reliance and Idea is working on this phone.

I dont understand why is Vodafone barring the network services, Fly agents are not bothered and Dealers are not bothered.

Why are these mobiles allowed to be sold in first place?

Why is the governing authority silent on this matter?

Why is the consumer left to suffer for no mistake of his?

If the manufacturer advertises his instrument through media, without a valid IMEI
number, why is it not made mandatory to confirm validation and authenticity of IMEI numers attached to the instruments ?

How is a consumer expected to know this?