The best way to be online everywhere and all the time, is to buy a tourist sim card with 4G internet. The cellular service on the island is very good and 4G internet is very fast. Like this you can use your smartphone all the time, stay connected, search what you need when you need it and use google maps for navigation on Koh Samui. You can find your villa, beaches, supermarkets and many more in our map. You can buy the sim card either at the True Move shop in the arrival zone of the airport or at the grocery stores (7-Eleven / Family Mart). One week unlimited 4G internet is about 150 Thai baht.