^Yes, they told my friend same shit. Then next time I went with him and I was also told same. I asked them to give it in writing and I will take matter forward with Samsung. They started saying, there are many other customers, we don't have time and all. So I took a piece of paper and wrote what they said and I asked them to put a shop seal on it. They were reluctant to do it. I waited for 15-20 more minutes and told them (rather shouted in bit high voice) that I am gonna sue them in consumer court and they have to face a legal proceeding for not providing service. And also made them hear the voice I recorded on my phone. And then they apologized, started saying sorry and all and took my friend's mobile for service. He also told me they usually don't take such mobiles, but they gave an exception in my case. Exception my ass.
So, you are completely entitled to warranty, doesn't matter from where you bought. If any service center refuses to service your mobile, shot an email to samsung regional office or samsung india.