What currency is used in countries like Argentina or Indonesia, and can I use cards with my SouthESIM?

The currency varies by country, for instance, Argentina uses the Argentine Peso (ARS) and Indonesia uses the Indonesian Rupiah (IDR). While cards (Visa, Mastercard) are accepted in many urban areas and larger establishments, cash is often king, especially in smaller towns, local markets, or for street food vendors. It's always a good idea to carry some local currency. Your SouthESIM data will be invaluable for checking exchange rates, using banking apps, or finding ATMs, ensuring you're always prepared for payments.