It's a mixed bag, pilot! While Poland is an EU member, 'Roam Like at Home' primarily benefits EU citizens. For UK travelers post-Brexit, many carriers like O2, Vodafone, and Three have reintroduced daily roaming fees (typically £2-£6). US carriers like AT&T and Verizon almost always charge for international roaming. eSIMFlyer offers a predictable, cost-effective solution, letting you activate instantly upon landing at Warsaw (WAW) or Krakow (KRK) without worrying about exorbitant roaming bills.
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Will my existing UK or US SIM card offer free roaming in Poland with eSIMFlyer?
Updated April 22, 2026
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