HTC — Buying mobiles in online has no manufacture warrenty?

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Hyderabad, Andhra Pradesh

I have bought a htc 526g mobile this feb. It has a receiver speaker broblem now. I contacted customer care service. they are saying that the things which we have bought in online has no manufacture warrenty. I have read forums but I haven't found any where where this rule has passed. Please help me out with this.