Mobile phone in Sri Lanka: It is really easy to buy a SIM card and use it with an unlocked phone. You may need to show your passport, so don’t forget it. Dialog, Mobitel and Etisalat are the most popular service providers in Sri Lanka.
A SIM card will cost about 200 Rupees while a top-up card of 500 rupees should be enough for you to communicate with your travel partners and check information on the internet from time to time.
Sri Lanka telephone country code: 94