I know there are a few posts about this already, but they are all a few years old so I want to see if anything has changed.

I will be traveling in U.P. for about two weeks and want to be able to make and receive calls with my cell phone. Previous posts have suggested that the best thing to do is to have my local hosts buy a prepaid SIM card (Airtel? Hutch?) for me. The second option would be to buy one in the airport (Delhi? Lucknow?), but that I need to present a copy of the identity page of my passport and two photographs.

Is all this still true? Any suggestions for the best phone company to use? Would I be able to buy a prepaid SIM in the airport in Lucknow or should I do it in Delhi?

Thanks.