The ETravelSim Sweden eSIM works at the major Kungsleden trailhead villages including Abisko, Nikkaluokta, and Kvikkjokk, but signal becomes very limited or non-existent on most of the trail itself, particularly the Padjelantaleden and Nordkalottleden remote sections. This is universal across all Swedish carriers because of the terrain, not specific to one network. For multi-day Lapland trekking, download offline Komoot or NaturkartanRules before departure, file a route plan with a friend, and treat the trail as a connectivity-free zone.