One of the best ways to keep in touch with family when you are off to explore India, is to get yourself an India calling card before you leave. In fact, get two. You can give one to your family so that they can call India cheap and stay in touch with you, and, for those times they can't call India because they don't know where you are, you can call them whenever you find a convenient phone.
Often, just knowing that you can speak to someone who is traveling far away eases the worry of not knowing if they are OK. Whether it is mum and dad calling just to say 'hi', or your best friend calling to say she got engaged, you can stay in touch without having to add the weight of a laptop to your travel pack.
India is a beautiful country. There is so much to see, so much to experience. Carrying a small card in your pocket will allow you to keep in touch, and, fit some extra souvenirs in your pack.