Iam using this phone and it Great design and build quality NFC RAM(3GB) Battery(3300 mah) Expandable memory(128 GB) No 32 inbilt memory Amazing sounds Smoothly touch very high resolution display minimum battery is no 4000 mahs Powerful Dual Frontal speakers.
1.3 ghz quadcore mediatek processor, 13 mp rare camera and 5 mp front camera which are really very good in taking pics and selfies. dual speakers with full hd display with 5.5 inch.The phone has one of the best sound quality of DOLBY ATMOS.
It has fast fingerprint sensor at the back,
has VR mode system which comes first in this phone in India which gives you 3 D experience in your home .
This mobile Lenovo Vibe K4 note is a good option at price range of 12000