Extremely poor Vodafone signal and at many times No Network!! Not a single call gets completed without a call-drop. And this has been the case for many years now. I am self employed and have to mostly work from home. And by now, all my friends and business contacts know that they have to call me on my landline because they can't reach me on Vodafone. I have registered several complaints with Vodafone but there has been no improvement. Their service in my area is not worth even a single star rating :(
------- Edited on 2017-08-10 -------
Gurgaon Sector 15 Part 2 is my area. And I just wrote in detail about the pathetic Vodafone signal strength here.