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Official Languages: No official language

English is commonly used on many expedition cruises and by international research and tourism staff, but language use varies by operator and nationality.

Mobile Network: There is no normal public mobile network across most of Antarctica. Some ships offer satellite-based connectivity, often slow, expensive, and weather dependent.

Roaming/SIM/eSIM: Do not rely on normal roaming in Antarctica, because public mobile coverage is generally unavailable. A local SIM is usually not relevant on the continent itself. If your ship offers onboard satellite service, that is typically your main option, though it may be slow and costly. An eSIM can help in gateway cities before departure, but it will not solve connectivity on the continent unless tied to the operator's satellite system.

Card acceptance is extremely limited on the continent itself. On expedition ships, cards are commonly accepted for onboard purchases, but cash use depends on the operator. In gateway cities such as Ushuaia, Punta Arenas, Christchurch, Hobart, or Cape Town, cards are widely accepted.

Tipping is not a continent-wide custom because tourism is mainly ship based. On expedition cruises, gratuities for expedition staff and crew are commonly suggested by the operator, often with guidance per person per day. In gateway cities, tipping follows local practice in the departure country.

Plug Type: No standard nationwide plug type; power access depends on ship, station, or departure country, commonly Type C, I, or F,

Voltage: No single standard; often 220 to 240 V on ships and stations, but confirm with

Adapter: Commonly yes. Bring a universal adapter and check your ship or operator's cabin power details before departure.