If you are looking for a smart phone under 15k which has best value for money then go for mi a1 .
I am using this phone for 3 months and from my experience I can say that it will never dissappoint you.
The best thing about this model is its camera. its dslr type visuals will help you clicking beautiful images.
Although I have found some issue in its battery storage , it has no other disadvantages.
Ram wise , rom wise , camera wise , software wise it feels like a 20k mobile phone but it comes under 15k range.
So dont miss the oppertunity to buy this before its price increases.