Choosing the right eSIM for Vietnam means balancing price, data allowance, speed, and coverage. We have tested all four recommended providers — Airalo, Yesim, Saily, and Drimsim — and compared their real-world performance for Vietnam. This guide covers everything you need to know.
Why you need an eSIM for Vietnam
Vietnam's mobile networks — Viettel, Mobifone, and Vinaphone — offer strong 4G coverage across the country. Ho Chi Minh City, Hanoi, Da Nang, and Hoi An have excellent connectivity with speeds of 20–40 Mbps. Even less-visited areas like Ha Giang, Phong Nha, and the Mekong Delta have reasonable coverage along main roads. Vietnam is extremely affordable for mobile data — local plans cost under $5 for generous data — but buying a local SIM requires passport registration and a visit to a carrier shop.
Best eSIM providers compared
Airalo offers multiple Vietnam plans with strong coverage through Viettel. Yesim covers Vietnam with competitive pricing. Saily offers mid-range plans. Drimsim's per-MB rate in Vietnam is around $0.01–0.02/MB — among their cheapest destinations, making Drimsim a surprisingly good option for Vietnam.
For current pricing, see our Vietnam destination page.
How to set up your eSIM
Setting up takes about five minutes. Check your phone supports eSIM (compatibility list), then:
Step 1: Choose a provider and plan based on your data needs. Light users need 1–3 GB; moderate users 5 GB; heavy users should consider unlimited plans from Yesim.
Step 2: Purchase and install before departure. Scan the QR code on WiFi at home — not at the airport.
Step 3: On arrival, enable the travel eSIM for data and keep your home SIM for calls. See our installation guide.
Data usage tips
Grab is essential. Grab is the dominant ride-hailing app in Vietnam and the safest way to get around. It requires constant data. Ha Long Bay and island trips. Coverage on Ha Long Bay boats varies. Download entertainment and maps before boarding. Motorbike loops. The Ha Giang Loop and other motorbike routes have variable coverage. Download offline maps and the Maps.me app. VPN note. Vietnam occasionally restricts certain websites. Consider a VPN alongside your eSIM — see our VPN guide. Budget 3–5 GB for two weeks. Vietnam trips are moderately data-intensive, mostly for navigation and Grab.
eSIM vs other options
Before eSIMs, travelers relied on expensive roaming ($10–20/day), airport SIM kiosks (queues, language barriers), or pocket WiFi (bulky, needs charging). An eSIM eliminates all friction — arrive connected with no extra hardware. See eSIM vs pocket WiFi.
FAQ
Can I keep my home phone number? Yes — eSIM handles data, physical SIM handles calls using dual SIM mode.
What if I run out of data? Top up in the provider's app without reinstalling.
Does coverage work outside cities? Yes — our providers use tier-1 local carriers with national coverage.
Our recommendation
For most travelers to Vietnam, Airalo offers the best balance of price and reliability. For unlimited data, choose Yesim. For privacy, try Saily. For pay-as-you-go, consider Drimsim.
Compare all four providers with real pricing.
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