What are the roaming implications for UK or US SIM card users in Czechia, and how does eSIMFlyer compare?

Navigating roaming in Czechia depends on your home SIM. For EU citizens, 'Roam Like at Home' generally applies. However, for UK travelers post-Brexit, most major UK carriers (e.g., O2, Vodafone, Three) have reintroduced daily roaming charges, often £2-£6 per day. US carriers like AT&T or Verizon typically offer expensive international day passes or pay-per-MB rates. eSIMFlyer provides a transparent, cost-effective alternative, activating instantly upon landing in Prague without hidden fees, ensuring you're connected for less.