San Marino is a hilltop republic completely surrounded by Italy, and most visitors come for a day from Rimini, Bologna or the Adriatic coast. It is not a member of the EU or the EEA, which makes roaming slightly unpredictable: whether your home plan treats San Marino like Italy depends on your carrier and on which network your phone connects to at that moment. co:sim's San Marino eSIM runs on Italian networks (TIM, WindTre and Iliad, with 5G listed), which cover the republic from inside and around its borders. This guide explains the roaming picture, the plan options, and why a regional plan is often the easiest choice.
EU or EEA phone plan: San Marino is not covered by the EU roaming regulation. In practice, many visitors stay on Italian networks and pay nothing extra, but if your phone attaches to a San Marino network, some carriers bill it as non-EU roaming. Check your carrier's list of included countries before you go.
UK, US, Asian or other plan: you pay your carrier's international roaming rate. A prepaid eSIM is almost always cheaper.
The San Marino eSIM lists TIM, WindTre and Iliad (5G). At the time of writing (October 2026):
Plan type
Options
From
Daily plans
1GB, 2GB, 3GB, 5GB or 10GB of high-speed data per day
$1.99 per day
Fixed data
1GB for 7 days, then 3GB, 5GB, 10GB or 20GB for 30 days
$1.99 (1GB / 7 days)
Validity starts at first connection, you have 90 days to install after purchase, and some plans can be topped up. Check the plan page for current prices.
San Marino is almost always part of a bigger Italian trip, and the Europe (35 areas) plan covers both Italy and San Marino (and Vatican City) on one eSIM. That means you do not need to think about which side of the border a tower is on. If you are only popping in for an afternoon and already have Italy data, check whether your Italy plan's network also covers the route up to the Città: the towns are very close to the Italian border, but only a plan that lists San Marino guarantees it.
The republic is small (about 61 square kilometres), and mobile coverage is good in the historic centre on Monte Titano, in Borgo Maggiore and along the main road from Rimini. The steep old town can create dead spots inside stone buildings and in the towers, and the cable car to Borgo Maggiore passes some weaker areas. Expect congestion on summer weekends and during events, when the centre fills with day-trippers.
No. San Marino is not part of the EU or EEA, so the EU roaming regulation does not cover it. Some carriers include it anyway, so check your own tariff.
For maps, messaging and photos, 1GB is usually enough for a day in San Marino.
San Marino is easy to visit and easy to stay connected in, as long as your plan explicitly includes it. A regional Italy-plus-San-Marino plan is the simplest way to guarantee that.
co:sim Team
