The ETravelSim Taiwan eSIM is for Taiwan and works on the main island, including coverage at most major ferry terminals and arrival points on Penghu, Kinmen, Matsu, Green Island (Lyudao), and Xiaoliuqiu. Coverage on these outer islands is more limited than on the main island and varies by carrier — main towns and ports stay connected, while remote beaches, hiking trails, and the smaller outlying islets often see signal drops. For Penghu and Kinmen-focused trips, expect city-area connectivity but plan offline navigation for everything else.