thanks for your answer. Could you confirm that this info is right: I had a friend who recently purchased samsung mobile. he clearly showed me that samsung now applies regional lock on their products, and the shop where he purchased the mobile confirm to it. The shop said that the last two years, samsung has applied regional lock to their product.
The region lock only applies, if you never used the phone in the region it was intended to be. For say if you buy the european model and receive or make a call for atleast 5mins, the region lock gets deactivated. It is safe afterwards to use it in any other territory that supports the bandwiths.