Planning a trip to Vietnam and looking for the best way to stay connected in Vietnam? The cheapest way is a local prepaid sim card, the easiest way is an e-sim card for Vietnam. This is a complete guide for buying a sim card for Vietnam with everything you need to know: where to buy a sim card, the best e-sim cards for Vietnam, up to date prices as per May 2023, the best 4G/5G network in Vietnam, my recommendation and even information about international sim cards for Vietnam.