I myself personally recommend this mobile if you are searching for a mobile around 15 thousand here is it. it commes in 3GB variant and 4GB ram variants with different prices 4GB ram model has 64 GB expandable memory with qualcom snapdragon 625 64 bit processor which is power efficient battery. it has 4100 marathon battery. it has hybrid sim slot and a expandable memory card upto 128 GB. it has got 5.5 inch full HD display
interestingly ih has 2.5d curved glass fullmetalic body accurate fingerprint sensor and many other sensors like ir blaster e compass etc.
it doesnt support fast charging but battery works pretty good. and no lag with functioning and heating issues.
its quite good for this price range ;)