One of the things which made the India trip a pleasant one was a cell phone. I had bought an Indian cell phone back in July 2007 when I went there with my grandson, Mark. And then I lent it to my Woodstock classmate Robert B and he used it when he took a group of college students to India in January 2008. Then I again used it in October 2009, during this last trip to India.
The one thing I forgot was to carry extra passport photos with me, which is a good thing to do on any trip abroad, India or otherwise. Of course, now, there are good and cheap photography shops in India, even in Landour, Mussoorie, which will take the photos and give you copies, often times within 4 or 5 hours, or less.
It was easy to communicate with Woodstock School people, at the alumni office, from our Landour hotel, also with travel agents in Dehra Dun, Delhi, Jhansi, Datia, Orccha, etc, and persons and offices in Delhi
It's an old (2007) Nokia phone - no bells and whistles or picture taking, etc., which I'll be glad to lend to others.