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Official Languages: English

English is the official language and is widely spoken throughout the country.

Mobile Network: Mobile coverage is generally good in and around Saint John's, the airport, and main tourist areas on Antigua. Coverage can be weaker in more remote coastal areas, on smaller roads, and on Barbuda. Data speeds are usually adequate for messaging, maps, and normal travel use, but can vary by location and network load.

Roaming/SIM/eSIM: Roaming is convenient for short stays but can be expensive, especially for data. A local SIM is usually better value for longer stays if your phone is unlocked and you need regular mobile data. eSIM can be the easiest option if your device supports it, since it avoids shop visits, but local prepaid SIM plans may still offer better value or stronger local support. For most visitors, roaming works for arrival day, while local SIM or eSIM is typically the better choice for a multi-day trip.

Cards are widely accepted at hotels, larger restaurants, supermarkets, and many tourist businesses on Antigua. Smaller shops, local food stalls, beach vendors, and some taxis commonly prefer cash. Carry small amounts of East Caribbean dollars for everyday purchases.

A service charge of around 10 percent is commonly added at hotels and restaurants, so check the bill before tipping extra. If no service charge is included, a tip of about 10 to 15 percent is typical for good restaurant service. Taxi drivers do not always expect a large tip, but rounding up or adding a small amount for helpful service is common. Porters and hotel staff are often tipped small cash amounts.

Plug Type: Type A and Type B

Voltage: 230 V, 60 Hz

Adapter: Visitors from countries using Type A or Type B plugs may not need a plug adapter, but should check voltage compatibility because 230 V is standard. Travelers from Europe may commonly need a plug adapter despite similar voltage. A dual-voltage charger is recommended for electronics.