Micromax canvas 4 plus is a good smartphone under 12k which is available in all major e-commerce website.
It has a mediatek octa core processor with 5 inch amoled display, it has a 1GB ram, it has a 16GB of internal storage, it has a 13mp rear camera and a 5 mp front camera which are able to take 1080p videos and photos. It has a 2000mah li ion battery which doesnt give good battery backup
It lasts for 3-4 hours only. Also the gaming experience is not that good with this device when it comes to high end gamimg it doesnt perform good. Also the battery is not enabled with fast charging. The design of this smartphone is very gpod and ot is very loght weight and easy to carry.it doesmt heats up a lot but while charging if you use it may heatup unusually
Overall it is a very good device but only the problem is associated with battery backup.