Vietnam has solid mobile coverage in its cities and tourist corridors, though the honest truth is that network quality and internet freedom are more nuanced here than most travel sites admit.
Vietnam
Việt Nam
8.3
★★★★☆
Coverage score
// Why get an eSIM
Saily vs. roaming on your home SIM
| SailyRECOMMENDED | Roaming | |
|---|---|---|
| Setup | 2 min, pre-trip | Automatic |
| Cost | Flat, upfront | Per-day, uncapped |
| Speed | Full local speed | Often throttled |
| Local number | No (data-only) | Keeps your number |
Prepaid eSIM data plan · affiliate link
⚡ POWER TIP
If your eSIM connects to Vietnamobile on arrival in Hanoi, manually switch your network to Mobifone or Viettel in your device settings. Vietnamobile has significantly slower speeds in northern Vietnam.
⚠️ VPN LEGAL — BUT READ THIS
VPNs are not explicitly banned in Vietnam, but internet censorship is real. Vietnam's 2018 Cybersecurity Law gives the government broad content control powers. Some sites are throttled or blocked. A VPN is widely used by locals and travellers alike. See our internet note below.
⏱ Facts verified July 2026 • Always confirm regulations before travel
// Network operators
Viettel
Vietnam's largest network and the one with the best rural and northern coverage. Strong signal in Hanoi, the northern provinces, and along the coast. eSIM supported on international tourist plans. If you're heading anywhere off the main tourist trail, Viettel gives the best chance of staying connected.
Mobifone
The second major carrier. Best coverage in central Vietnam, particularly Da Nang, Hoi An, and Hue. Generally good in Ho Chi Minh City and the south. eSIM supported. A reliable alternative to Viettel if you're spending most of your time in the centre or south.
// The honest picture
What Vietnam's Cybersecurity Law means
Vietnam's 2018 Cybersecurity Law requires internet platforms to store data locally and comply with government content removal requests. In practice, some political sites and a small number of social platforms are throttled or blocked. WhatsApp, Google, YouTube, and Facebook are generally accessible but can be intermittently slow.
VPN use in practice
VPNs are not banned and are widely used by both local professionals and tourists. There is no enforcement against tourists using VPNs for privacy or accessing restricted content. Set up your VPN before you travel — downloading VPN apps from within Vietnam can be difficult if the relevant stores are throttled.
💡 Bottom line for tourists
Most travellers will never notice any internet restrictions — the main tourist apps, maps, booking platforms, and messaging services all work. If you use specific platforms that might be affected, installing a VPN on your device before you enter Vietnam is straightforward, legal, and worth doing.
// Practical tips
Emergency numbers
Police is 113, fire is 114, ambulance is 115. None of these are a single unified number, so save all three before you travel. Quality of English-speaking operators varies significantly outside major cities.
Ha Long Bay and remote areas
Coverage on Ha Long Bay cruises and in remote highland areas like Sapa can be genuinely patchy to non-existent. Download offline maps, your accommodation details, and key emergency information before boarding any boat or heading into the mountains.
Grab is essential
Grab (Southeast Asia's ride-hailing app) is how you get around every Vietnamese city safely and fairly. It requires an active data connection to book and track rides. Your eSIM is what makes this work from the moment you leave the airport.
// Travel security
Protect your identity abroad
Café WiFi, hotel hotspots, and hostel networks carry standard public network risks. Avoid banking on public WiFi and use your eSIM data for anything sensitive. A VPN is legal and useful here on public networks — it protects your traffic from the network operator regardless of what else it does for content access.
Alternative ID for sign-ups
Booking platforms, tourist WiFi portals, and local apps all collect personal details. A disposable email and identity for sign-ups keeps your real information out of databases you will never interact with again.
Surfshark Alternative ID
Generate a disposable identity for every app you sign up to abroad. Your real details stay private.