Communications on St Helena, a remote island in the South Atlantic Ocean, are still possible despite being somewhat outdated. The island has its own postage system and issues its own postage stamps. The correct postal address for St Helena is important to prevent mail from being misrouted. Delivery to and from St Helena goes through the UK and South Africa before reaching the island. Sea freight is the primary method of transportation for larger items, while air freight is available for quicker delivery. Telephone and internet services on the island are provided by Sure under an exclusive contract with the government. Overall, communication on St Helena may be slower and more limited compared to other parts of the world.
http://sainthelenaisland.info/communications.htm