best android phone at price range below 15k

Hello Rito, welcome to the forums at Android Central!

If you mean $15,000.00 dollars, well, any new flagship Android phone is good and you'll still have plenty of cash left.

Sent From my Gold Platinum Galaxy S6 Edge
 
If that's rupees, you're talking about $235/£150.
If it's dollars, you're not talking about anything....you're laughing. :)

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I would have to say Moto G would be in that price point. You could also try the ASUS ZenFone 2 which I am using. US Retail is $299 for the 64GB x 4GB version and they have many different models.
 
Moving this to General Help, since it isn't really an intro ...