Can I expect free roaming in Réunion with my standard UK, US, or non-French EU SIM card?

This is a nuanced situation for travelers. While Réunion is an overseas department of France, which typically falls under the EU's "Roam Like at Home" policy, many non-French EU carriers (e.g., from Germany or Spain) often impose strict "Fair Use Policies" or data caps for remote territories. US and UK carriers like AT&T, Verizon, or Vodafone UK almost certainly categorize Réunion as a "Rest of World" destination, incurring significant daily or per-MB roaming charges. WorldESIM offers transparent, cost-effective data bundles specifically for Réunion, providing predictable expenses without hidden fees.