Jambo! Iceland is a ring-road and aurora-forecast country, so being online matters from minute one. Install a JamboSim eSIM before you fly and land at KEF already connected.
Terminal Wi-Fi is free, but your own data covers road and weather warnings on the drive to Reykjavik.
Flybus and Airport Direct coaches reach Reykjavik in about 45 minutes; hire cars leave from the terminal.
KEF has one terminal, the Leifur Eiríksson Air Terminal. Local time is GMT all year.
Yes, your phone joins an Icelandic network as soon as you land.
Yes, coverage follows the main roads and towns around the island.
Install before departure and activate on arrival.