Speaker problem

My zenfone 2 ze551ml model bought in india from flipkart is just 45 days old and it has got a problem, there is a crackling sound while playing any audio from rear speaker from yesterday, i have tried to turn off audio wizard even factory reset the phone but no benefit, what can bw the problem, i have unlocked the bootloader already, if i send this for warranty service shall i be eligible for that, hope u people got me right

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