Does EastESIM work while hiking famous mountains like Mount Fuji?

EastESIM aims for extensive coverage, and you'll generally find reliable signal at the base and lower trails of popular mountains like Mount Fuji in Japan or Mount Bromo in Indonesia. As you ascend higher towards the summit, especially in very remote sections or deep valleys, the signal may become intermittent or disappear. It's always a good idea to download offline maps and essential information before starting a high-altitude trek, but EastESIM will keep you connected where possible for emergencies and sharing those initial scenic shots.