eSIM for San Marino

Your eSIM connects as an international roaming line on the republic's own mobile network, so you get 4G and LTE across the City of San Marino and down into Borgo Maggiore. The historic centre on Monte Titano, the cable car up from Borgo Maggiore and the main squares are well covered, which is where most visitors spend their time. Be realistic about the terrain though: San Marino is a small, steep, hilltop state, and signal can thin on the wooded slopes below the old walls, on the quieter rural lanes near the border and in the deeper valleys away from the two main towns.

Because this is a roaming line rather than a local SIM, it latches onto the local partner network automatically and needs no local registration. It is data-only, with no San Marino phone number and no SMS, so keep your usual home SIM in the phone for bank and login OTP codes and for ordinary calls, while WhatsApp, email and maps all run over the data. You do need to switch Data Roaming on for the eSIM line, which is normal for a travel eSIM and carries no extra cost.

San Marino has no airport of its own, so almost everyone arrives by road, usually crossing in from Rimini and the surrounding Italian countryside. If your phone shows 'No Service' just after you cross into the republic or step off the bus at Borgo Maggiore, toggle Airplane Mode on and off once so the handset re-selects the partner network, then give it a few seconds to register.

One honest note on how roaming works: your traffic may leave through an internet gateway outside San Marino, so the occasional website or app can treat you as if you are browsing from another country. Everyday tools like maps, messaging and browsing behave normally, and if any of that routing ever changes we will say so plainly rather than dress it up.

• Install and set up the eSIM over home Wi-Fi before you travel, because most plans only start counting when the eSIM first connects to a network inside San Marino.
• Set the Simzora eSIM as your mobile-data line and switch Data Roaming on for that line only, leaving your own SIM untouched for calls and OTP codes.
• As you will most likely drive or take the bus up from Rimini rather than fly in, have the eSIM already installed so it can connect to the local partner network the moment you reach Monte Titano, with no fiddling at the border.