步驟 4
電源・通訊・SIM
此資訊更新至 2026/08/11。
※ 通訊環境可能因地區和時期而異。
電壓與插座形狀
電壓差異與插座類型
⚡220V / 50Hz
🔌Type A / C / F(混合型（多規格）)
🔄建議攜帶萬用轉接頭
💡Most modern outlets accept both US and European plugs.
SIM卡購買方式
機場與市區的SIM卡購買流程與費用
電信業者: Viettel, Mobifone, Vinaphone
eSIM與行動Wi-Fi
eSIM支援情況與Wi-Fi分享器選擇
📶Available
🏢Airalo, Holafly, Ubigi, Viettel eSIM
💰$5-20 for 1-10GB / 7-30 days
💡Viettel supports eSIM with excellent nationwide coverage.
Wi-Fi環境
公共Wi-Fi普及狀況與安全性
📡good
🏨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.
網路限制與VPN
社群媒體與網站的存取限制及VPN需求
🔒low
🚫Facebook and social media occasionally throttled but generally accessible
🛡️不需要VPN。
💡Social media works but may be slow at times; VPN helpful for consistent speed.
實用當地App
交通、翻譯、地圖等便利應用程式
🚗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.
國際電話
撥打國際電話的方式與通話App
📞+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.