cells and loos
Totally agree with @implicateorder
It takes a lot less infrastructure investment to provide subsidised mobiles, associated infrastructure and call charges than a sea of copper landlines. It is clever strategy seen all over Asia, but obviously not in Europe/US where that investment decision was made pre-IT and now needs to be maintained.
Internet provision is seen in India as a luxury item (whether by copper broadband or 3G) and so is costed and taxed appropriately. On the other hand mobile call charges are priced ridiculously low in comparison to the West.
But going back to the provision of loos, the vast majority of toilets are not connected to mains sewerage even in quite prosperous households, at least outside of cities. modern (bio) septic tanks are the order of the day and 'grey water' treatment stategies are increasingly common. This has the much needed benefit of tackling water shortages.
India is a really complex society - it demeans Westerners to make facile and 'easy' statements as if they understand India.