Hanoi Noi Bai International Airport

Official Languages: Vietnamese

Vietnamese Is the Only Official Language. English Is Common in Hotels, Tour Offices and City Cafes and among Younger People in Hanoi and Ho Chi Minh City, and Much Thinner with Taxi Drivers, Market Sellers and Once You Leave the Big Cities

Mobile Network: 4G Reaches Almost the Entire Population and 5G Passed Roughly Ninety Percent of It during 2026, after One of the Fastest Rollouts Anywhere. Population Coverage Is Not the Same as Area Coverage Though, so the Far Northern Mountains and the Smaller Islands Still Drop Out

Roaming/SIM/eSIM: An eSIM Is the Simplest Route on a Compatible Phone, Because It Activates before You Land and Leaves Your Home Number Reachable While You Use Local Data. A Physical Local SIM Can Be Cheaper on a Long Stay and Gives You a Vietnamese Number, but It Needs an Unlocked Handset and a Shop Visit. Roaming Is the Costly Default. Whichever You Choose, the Phone Has to Handle 4G. All 2G Shuts Down Nationally on 15 September 2026, and One National Network Retired 3G Years Ago

Cards Work in Hotels, Malls, Supermarkets and Mid-Range Restaurants, but Cash Still Runs Street Food, Markets and Short Rides. Prices Are Quoted in Dong and Have to Be Paid in Dong. Count the Zeros on a Note before You Pay, Because the 20,000 and the 500,000 Are Both Dark Blue Polymer and the Same Width, and Mistaking One for the Other Costs 25 Times the Price

Tipping Is Not Part of Everyday Vietnamese Life and Nothing Is Owed, Though It Has Become Normal in Visitor-Facing Work. Mid-Range and Upscale Restaurants Often Add a Service Charge, so Read the Bill before Adding Anything. In a Casual Place, Rounding Up or Leaving the Small Notes Is Plenty. Guides, Drivers, Porters and Spa Staff Appreciate a Modest Amount Given Directly, and a Street Food Stall Expects Nothing

Plug Type: Type A and Type C

Voltage: 220 V, 50 Hz

Adapter: Most Sockets Take Flat American-Style Pins or Round European Pins, and Many Take Either. Visitors from the UK, Ireland and Australia Need an Adapter. Phone and Laptop Chargers Rated 100 to 240 Volts Work as They Are, but an Appliance Built for 110 Volts Only Will Not