1. Viettel Tourist SIM 

The first SIM card on the list is Viettel Tourist SIM. Viettel is the most trusted and widely used network provider in Vietnam. They frequently offer deals for on-net calls and provide free 4G/5G Viettel usage.

2. Vinaphone, Mobifone Tourist SIM Card

Similarly to Viettel, the Vinaphone tourist SIM card is one of the most popular SIM cards in Vietnam. Vinaphone network has international partnerships with 19 countries (21 networks), covering most of the favorite destinations for Vietnamese travelers, including: Australia, the United States, China, Thailand, Egypt, France, Germany, Italy, Hong Kong, Indonesia, Japan, South Korea, Laos, Cambodia, Malaysia, Singapore, Switzerland, Taiwan, UAE.