Are international roaming charges waived in Italy for EU, UK, or US mobile plans?

For EU mobile plans, 'Roam Like At Home' provisions mean that roaming in Italy is typically included at domestic rates. However, for UK mobile plans post-Brexit, while some providers may still offer inclusive roaming, many now apply charges for data usage in EU countries, including Italy. US mobile plans almost universally treat Italy as an international roaming destination, requiring specific add-ons or incurring high pay-per-use rates. Therefore, while some EU plans benefit from free roaming, UK and US users should verify their specific plan details or consider a CoreESIM for transparent, cost-controlled data in Italy.