Communication / Telephone / Internet
Telephone telefaxes and internet services are numerous. The country code for Sri Lanka is 94. Area or mobile phone number begins with '0' which you drop when you call into Sri Lanka from outside the country.
Phone:
Consider buying a Sri Lankan SIM card for your mobile phone - Sri Lankan mobile phone call rates are relatively cheap, both for local and international calls. There is a Dialog GSM shop outside airport arrivals.
Internet:
Almost every hotel in the country has Wi-Fi Internet access, as well as many restaurants and cafes (although connections are unstable). Many even offer free internet access particularly in areas such as Galle Fort. The number of places with Wi-Fi access is growing and most major tourist centers have at least one or two Internet cafes but be aware that the connection speeds are slow outside Colombo.
Sri Lanka Telecom shops (e.g. Colombo World Trade Center) sell scratch cards for immediate Internet access, which are good value and easy to use. Or if you need constant access to the Internet, you can use a variety of mobile communication packages that offer all telecommunications providers in Sri Lanka.
All major phone companies in Sri Lanka have their kiosks at the airport where you can buy a SIM card upon arrival. The main operators are: Dialog (dialog.lk), Mobitel (mobitel.lk), Etisalat (etisalat.lk), Airtel (airtel.lk) and Hutch (Hutch.lk). The operators Dialog and Mobitel, as a rule, communication and tariffs are the best. Almost everywhere on the island there is a mobile connection, except for a few remote rural areas, including the reserve Singaraja.
IDD facilities are available in the most majority of tourist hotels and hotel fax lines are plentiful. To contact a BT operator from Sri Lanka, for charge card or reverse-charge calls, dial 432999 (but be aware that some hotels will block this number).
Postal Services
The Department of Posts, functioning under the brand name Sri Lanka Post, is a government operated postal system in Sri Lanka. As the postal service within the country as well as international was always working smoothly. The Main Post office is in Colombo, but you can find little shops all around Sri Lanka. http://www.slpost.gov.lk/
Courier.lk is one of the few companies in Sri Lanka that provide an efficient Postal Service/Post Service throughout the country. Their postal services also cover many countries such as Australia, India, Pakistan, the US, UK, and the Middle East. Locally they cover every city and suburb. They have branches in the main cities of Maharagama, Hambantota, Vavuniya, Gampaha, Kurunegala, Polonnaruwa, Kandy, and Rajagiriya apart from their main officers at Pettah and Wellawatta.