Vietnam's mobile networks — Viettel, Vinaphone, and MobiFone — cover Ho Chi Minh City, Hanoi, Da Nang, Hoi An, and the long coastal corridor with strong 4G/LTE and growing 5G in the big cities. Coverage extends well into the Mekong Delta, Halong Bay, and the Sapa highlands. A Vietnam eSIM activates at Tan Son Nhat (SGN) or Noi Bai (HAN) without the passport-copy process physical SIM purchase requires, so you're on Grab and Google Maps from the moment you clear arrivals.
Best time to visit: November–April
Networks in Vietnam
AskHeidi eSIMs in Vietnam connect to Xin Chao via the Airalo Partners Network. The specific carrier is shown on each plan below.
Popular destinations in Vietnam
Coverage provided by
What you get with every plan
How it works
Three steps. No store. No swapping.
What travelers say
“Used it in Japan for 2 weeks. Setup took literally 1 minute. Flawless 4G the entire trip.”
“Way cheaper than my carrier's roaming pass. Paid $12 for my whole Europe trip. Speeds were top tier.”
“Scanned the QR code at the airport, connected before I even got through customs. Magic.”