Will my US, UK, or EU-based SIM card incur international roaming charges in Uruguay, or is it covered by my domestic plan?

Uruguay is not included in typical US, UK, or EU domestic roaming agreements. Therefore, using your home SIM card from carriers like AT&T, Verizon, T-Mobile (US), or Vodafone, O2, EE (UK/EU) in Uruguay will almost certainly activate their highest-tier international roaming rates, often structured as expensive 'Day Passes' (e.g., $10-$15 per day) or per-MB charges. For heavy data users, DataESIM offers a significantly more cost-effective and transparent solution, providing high-speed local data without incurring exorbitant roaming fees.