The ETravelSim Philippines eSIM works across Boracay's White Beach, Cebu and Mactan, Bohol's Chocolate Hills, Siargao surf areas, and Palawan including Puerto Princesa and El Nido town with reliable 4G/LTE on Smart. Coverage softens in El Nido's remote limestone lagoons during island-hopping tours and on smaller Siargao surf breaks away from main villages. This is universal across all Philippine carriers because of geography, not specific to one network. Save offline maps before boat trips.