The ETravelSim Taiwan eSIM runs on Taiwan Mobile, one of Taiwan's three major mobile networks alongside Chunghwa Telecom and FarEasTone. Taiwan Mobile has solid 4G/LTE and 5G coverage across Taipei, the HSR corridor, and the major tourist destinations where most travelers spend their time. Chunghwa is widely seen as having the broadest island-wide reach, but for trips focused on Taipei, Taichung, Kaohsiung, the HSR, and main attractions, Taiwan Mobile covers the route.