After purchasing your Cellesim eSIM, you'll receive an email with a QR code. On your smartphone, go to Settings > Cellular/Mobile Data > Add eSIM or Add Data Plan, then scan the QR code. Follow the prompts to label your new data plan. Ensure data roaming is enabled for your eSIM line once you arrive in Budapest.
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How do I activate and set up my Cellesim eSIM for use in Budapest?
Updated July 22, 2026
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