旅行準備ガイド · 通信
電源・通信・SIM
※ 通信環境は地域や時期により異なる場合があります。
⚡110V / 60Hz
🔌Type A / B(平型2ピン)
🔄日本・米国からはアダプタ不要
💡米国領—コンセントは米国と同じ。
通信キャリア: GTA, IT&E, Docomo Pacific
📶Available
🏢Airalo, Ubigi, T-Mobile eSIM (US roaming)
💰$8-25 for 1-10GB / 7-30 days
💡US eSIM plans from T-Mobile include Guam; international eSIMs also work.
📡good
🏨Fast and free in most hotels
☕Available in malls, cafes, and some public areas
💡Tumon tourist area has good WiFi coverage in hotels and restaurants.
🔒none
🚫None — all services freely accessible (US territory)
🛡️VPN不要。
💡As a US territory, Guam has the same internet freedom as the mainland US.
🚗Stroll Guam (local shuttle), rental cars
🗺️Google Maps, Apple Maps
💬iMessage, WhatsApp, LINE (Japanese tourists)
💡Rental car is essential; limited public transit available.
📞+1-671 (Guam)
🆘911 (Police, Fire, Ambulance)
📲Dial 011 + country code + number for international calls
💡Uses US phone system; domestic US calls dial 1 + area code + number.