Planning a trip to Vietnam and looking for the best way to stay connected on your trip? The cheapest way is a local prepaid sim card, the easiest way an e-sim card. This is a complete guide for buying a sim card for Vietnam with everything you need to know: where to buy a sim card, up to date prices as per August 2022, the best 4G/5G network in Vietnam, my recommendation and even information about international and e-sim cards for Vietnam.