I purchased Micromax Unite 2 18 months ago and I am still using it. For a value of 6500 INR, You are getting a 4.7 inch touch screen with 8GB internal storage, One GB for apps though.
Advantages:
Very easy to use.
Less SAR value( not much radiation)
Very Economical
Somewhat resistant to fall.( mine has a fallen a few times from a height of 6 feet and survived without even a minor damage, I would not recommend you to try the same though).
Disadvantages:
Very less APP storage space.(Only 1 gb, That means you can’t even install like ten apps without the phone showing you the message " Low storage space".
Comes with kitkat and if u upgrade it to lollipop, app space reduces to 700 MB, which means even a couple of extra apps hurts the memory.
Heats off too quickly when running heavy apps.