The topic of transmission towers built to facilitate mobile phone service is well known and some people are of the opinion that mobile phone transmission towers are wreaking havoc on the country.
For the perpetually connected, the experience of being unconnected is salutary; but not pleasant. The Sinharaja Forest Reserve is a world heritage site about three hours driving distance from Colombo. I spent two days there and unexpectedly found myself unconnected, except for a single location in the hotel that allowed the sending and receiving of texts if the phone was held high! It is not that the place is completely disconnected from electronic networks. I paid for the hotel using a credit card, which was processed through a fixed line.