Is roaming in Austria included with my home UK or US SIM card, or should I consider eSIMFlyer?

That's a common question for transatlantic flyers! For UK travelers post-Brexit, most major carriers like O2, Vodafone, and Three have reintroduced daily roaming charges (often £2-£6) for Austria, despite it being in the EU. US travelers, on the other hand, almost universally face expensive per-MB roaming rates or need to purchase costly international day passes. eSIMFlyer offers a much more predictable and budget-friendly alternative, activating instantly upon landing in Vienna, saving you from bill shock and ensuring you're connected without delay.