Micromax unit2 Which I purchased from 1year back and still now I dont have any problem with that.smooth touch camera and dual sim both 3g and sound also very good.
I rooted my phone after warranty.when I purchased internal memory was 4gb so apps 850mb only.now I increased to 2gb for apps.if u know how to root phone you can play like anything and this is the best phone for that below 7k price range.