Then you need to learn more about it, Indian English is more than just that one phrase. That's like saying, "if there is one phrase that, to me, defines American English, I think it would be "Howdy".
No it's not. My point is that "do the needful" is not a proper representation of Indian English, as the parent comment implied. There are a lot more pecularities that makes the dialect what it is, but people are just not aware of them (yet). A quick google search will tell you that.
