Can I expect free roaming in Lithuania using my existing UK or US SIM card?

For EU citizens, the 'Roam Like at Home' principle generally applies within Lithuania. However, for UK and US travelers, it's a different story. Post-Brexit, many UK carriers like O2, Vodafone, and Three have reintroduced daily roaming charges, which can quickly add up (£2-£6 per day). US carriers such as AT&T, Verizon, and T-Mobile often charge premium daily rates ($10-$15) or offer limited, throttled data. An eSIMFlyer provides predictable, affordable data, saving you from bill shock and ensuring consistent speeds.