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Official Languages: Tongan, English

English is widely used in government, tourism, and business, and many visitors can manage daily travel in English, especially on Tongatapu and in tourism settings.

Mobile Network: Mobile coverage is generally good around Nuku alofa and much of Tongatapu, but speeds and reliability can vary. Outer islands may have weaker coverage, slower data, or occasional outages.

Roaming/SIM/eSIM: For short stays, roaming can work if your provider has Tonga coverage, but it is usually expensive. A local SIM is commonly the best value for longer stays if your phone is unlocked, especially for calls and data on Tongatapu. eSIM availability may be limited compared with larger markets, so check support before arrival rather than relying on it.

Cards are accepted at some hotels, larger restaurants, supermarkets, and tour operators in Nuku alofa and a few resort areas, but cash is still important. Smaller shops, local markets, guesthouses, taxis, and outer islands commonly prefer cash.

Tipping is not a strong local custom in Tonga and is generally not expected. In higher end tourism settings, visitors sometimes round up the bill or leave a small tip for excellent service, but modest amounts are more appropriate than large tips.

Plug Type: Type I

Voltage: 240 V, 50 Hz

Adapter: Visitors from countries using different plug types will need a Type I adapter. Travelers from countries using 220 to 240 V equipment usually only need a plug adapter, while those from 110 to 120 V countries may also need voltage compatible chargers.