Best eSIM for Viêtnam

Activate your eSIM before landing and keep your dual SIM mode enabled so your UK number remains active for banking SMS and two-factor authentication codes. Viêtnam operates on UTC+07:00, placing Hanoi either 7 hours ahead of Greenwich Mean Time in winter or 6 hours ahead during British Summer Time. To reach someone back home, dial using the country code +84 for incoming calls from the UK, and plan video calls for early Vietnamese evenings to catch lunchtime in London.

Vietnamese is the only official language, and English signage thins out quickly beyond Hanoi and Ho Chi Minh City. Download the Vietnamese language pack in Google Translate for offline use before your flight — it supports camera translation, which is invaluable for menus and street signs. For getting around, Grab is the essential ride-hailing app across all major cities. Viêtnam drives on the right, but self-driving is strongly discouraged for visitors due to extremely dense motorbike traffic; rely on offline GPS maps if you travel by hired car with a driver through the highlands.

Hotels and hostels from Đà Nẵng to Phú Quốc typically offer free Wi-Fi, yet speeds often drop during peak hours. A dedicated data eSIM — easily compared alongside other eSIM plans for Asia — gives you reliable connectivity for navigation and translations throughout your trip.

Picking up a physical SIM card at Noi Bai International Airport in Hanoi or Tan Son Nhat Airport in Ho Chi Minh City is straightforward, with kiosks from Viettel, VinaPhone and MobiFone located in the arrivals hall. However, Vietnamese regulations require you to present your passport for SIM registration, and queues after long-haul flights can stretch beyond 30 minutes, especially during peak evening arrivals. Staff generally speak basic English, though explaining specific data plans can be tricky in smaller provincial shops.

Free Wi-Fi is widely available in Vietnamese cities — most phở restaurants, cafés along Hanoi's Old Quarter and hotels in Hội An offer it — but speeds drop significantly in rural areas like Sapa or the Hà Giang loop. Pocket Wi-Fi rental is offered at both major airports for around 100,000–150,000 ₫ per day, though carrying an extra device through motorbike-heavy streets adds hassle. UK roaming packages from EE, Three or Vodafone typically cost £6–8 daily, making a two-week trip expensive.

An eSIM avoids all these friction points: no passport verification queue, no extra hardware, and activation before you even board. If your itinerary also includes neighbouring countries, consider pairing it with an eSIM for China. For Vietnam specifically, instant setup from home means you land connected — ready to grab a Grab ride straight from the terminal.