Is roaming free in Poland with my UK or US SIM card, or is CheapESIM a better value?

For EU citizens, 'Roam Like at Home' applies in Poland, but for UK and US travelers, it's a different story. Post-Brexit, many UK carriers like O2 or Vodafone have reintroduced daily roaming fees, typically £2-£6 per day. US carriers like AT&T or T-Mobile US often charge $10-$15 per day or have expensive international plans. With CheapESIM, you get a transparent, one-time cost for your data, saving you potentially hundreds of pounds or dollars. For example, a 10GB CheapESIM plan might cost $20, while 10 days of UK roaming could easily exceed £50.