Get unlimited mobile data across 45 European countries with one eSIM: no physical SIM, no roaming charges and no new SIM at every border. Once we receive your email address, your eSIM QR code is emailed to you shortly (or 2 days before your start date if you book further ahead). Scan it to install in under 2 minutes. Important: Viator only shares a masked email address with us. After booking, please share your email address with us using the contact details on your voucher, so we can send your eSIM QR code. Coverage (45 countries): Albania, Algeria, Andorra, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Faroe Islands, Finland, France, Germany, Gibraltar, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Moldova, Montenegro, Netherlands, North Macedonia, Norway, Poland, Portugal, Romania, San Marino, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey, Ukraine, United Kingdom and Vatican City. Fast 4G/5G local networks, ideal for multi-country trips and Mediterranean cruises. Hotspot sharing is supported. How to set up: scan the QR code (Settings > Mobile Data / Cellular > Add eSIM), then on arrival turn on the eSIM line and enable Data Roaming for it. Your plan starts when it first connects. Before you book: your phone must be eSIM-compatible and carrier-unlocked. This is a data-only eSIM; it does not include a phone number, but you can call and message via apps like WhatsApp. Live support is available for setup and troubleshooting. Tip: install your eSIM before you travel so you're online the moment you land.