This is the best phone you can buy below 13k.
It comes with Snapdragon 650, Cortex-A72 cores which is very fast . Note 3 also enhances the battery back up, it has a 4050 mAh battery.
Its camera is also great with 16mp rear(led flash) with Phase Detection Autofocus(PDAF), a 0.1s ultra- fast focusing technique commonly found in DSLR cameras and 5 mp front cam. Its metal body looks very stylish. Its has two variant, a 2GB ram and 16GB internal memory which is priced at 10k and the other with 3Gb RAM and 32 Gb internal storage priced at 13k. Over all its a great budget phone.