Step 4
Power & Connectivity (SIM)
This information is as of 2026/08/11.
Connectivity may vary by region and season.
Voltage & Plug Types
Electrical standards and outlet shapes
⚡220V / 50Hz
🔌Type A / C / F(Mixed (universal outlets common))
🔄Usually not needed from Japan/US/Europe
💡Most modern outlets accept both US and European plugs.
Buying a SIM Card
Where to buy, costs, and activation process
📱Viettel, Mobifone, Vinaphone
🏪Airport arrivals, carrier shops, street kiosks
📋Passport required
💰Tourist SIM from $5-15 for 7-30 days
💡Viettel has the best nationwide coverage; very affordable data plans.
eSIM & Mobile Wi-Fi
eSIM availability and portable Wi-Fi rental
📶Available
🏢Airalo, Holafly, Ubigi, Viettel eSIM
💰$5-20 for 1-10GB / 7-30 days
💡Viettel supports eSIM with excellent nationwide coverage.
Wi-Fi Availability
Public Wi-Fi coverage and security
📡Good — widely available and often fast
🏨Free and fast in most hotels and hostels
☕Free in cafes, restaurants, and many shops
💡Vietnam has surprisingly fast WiFi; even budget hostels offer free access.
Internet Restrictions & VPN
Blocked services and VPN recommendations
🔒Low — occasional throttling
🚫Facebook and social media occasionally throttled but generally accessible
🛡️Not needed — but useful if experiencing slow social media
💡Social media works but may be slow at times; VPN helpful for consistent speed.
Useful Local Apps
Must-have apps for transport, translation, and maps
🚗Grab (dominant), Be (Vietnamese alternative)
🗺️Google Maps, Grab in-app
💬Zalo (local favorite), WhatsApp, Facebook Messenger
💡Grab is essential for rides and food; Zalo is how locals communicate.
International Calls
How to make international calls and alternatives
📞+84 (Vietnam)
🆘113 (Police), 115 (Ambulance), 114 (Fire)
📲Dial 00 + country code + number for international calls
💡Drop the leading 0 from local numbers when dialing from abroad.