Is using my UK or US SIM in Estonia cost-effective for data roaming with WestESIM?

While Estonia is part of the EU, the 'Roam Like at Home' benefit primarily applies to EU citizens. For travelers from the UK, post-Brexit changes mean most carriers like Vodafone or Three have reintroduced daily roaming charges, often £2-£6, making them expensive for extended stays. US carriers, such as AT&T or T-Mobile, typically offer international day passes at $10-$15 or charge per MB, which quickly accumulates. WestESIM provides a transparent, fixed-cost solution, offering superior value and predictable expenses compared to traditional roaming fees, ensuring you stay connected without unexpected bills.