San Marino Data Plans: What Carriers Charge vs What eSIMs Cost

A family of four on AT&T in San Marino pays $40/day ($10/day per line x 4). Over a week that reaches $280. The same family shares one travel eSIM on TIM starting at $1.14 for 1GB — a single purchase covers all devices through tethering. Verizon charges the same per-line rate. T-Mobile includes free data at 256 Kbps, which cannot load a map.

No. At 256 Kbps, T-Mobile's free international tier in San Marino cannot load a map tile in under 15 seconds. Video calling needs 2 Mbps minimum — eight times what T-Mobile provides for free. Their paid speed upgrade runs $15/day. A 5G eSIM on TIM at $0.86/GB gives you real speeds without the daily fee.

At 3 days in San Marino: AT&T costs $30, eSIM costs 1GB for $1.14. At 7 days: AT&T $70, eSIM same 1GB for $1.14. At 14 days: AT&T $140, eSIM same fixed rate. The eSIM billing model is flat — the longer the trip, the wider the gap. T-Mobile free tier is $0 but too slow at 256 Kbps to be usable beyond text.

Google Maps uses 5-10 MB per hour of active navigation in San Marino. On AT&T pay-per-use that costs $10-20 per hour of driving. On a roaming day pass at $10/day, maps are covered but you pay the daily fee regardless. On a travel eSIM at $0.86/GB on TIM, a full 8-hour day of navigation costs under $0.10. Download offline maps before departure to cut data usage by 90%.

For most travelers, data-only is the right choice. Data-only eSIMs for San Marino start at $0.86/GB on TIM. Voice+data eSIMs cost $15-40 more and include a local San Marino number — worth it only if you need a local number for two-factor authentication or calls from local businesses. For calls to home contacts, keep your home SIM active and use WiFi Calling (free on AT&T, Verizon, and T-Mobile). That combination costs less than a voice+data eSIM and keeps your home number active for incoming calls without roaming charges. Rates checked June 2026.

No. EU roaming is a rule for European carrier customers — US carriers (AT&T, Verizon, T-Mobile) are not subject to it. All three US carriers charge their standard international rates in San Marino: AT&T at $10/day, Verizon at $10/day, T-Mobile free at 256 Kbps. A travel eSIM cuts through the complexity — $0.86/GB on TIM's 5G network, no EU policy considerations required.

No. AT&T International Day Pass costs $10/day in all European countries including San Marino. Over 7 days that is $70. A 5GB eSIM plan costs $4.78 for the same period on TIM. The eSIM saves 93% and does not charge you on days when you only use WiFi — unlike the day pass, which triggers the moment any cellular data is used.

Yes. Multi-country European eSIM plans cover the Schengen Area — typically 30+ countries including San Marino — under a single data bucket. AT&T and Verizon roaming rates are the same in every Schengen country: $10/day per country. A regional eSIM buys you data that works across borders without activating per-country charges. If your itinerary includes San Marino plus 2-3 neighboring countries, the regional eSIM is cheaper than day passes for every country crossed.

GDPR governs how companies process personal data, not how your phone uses mobile data. A travel eSIM in San Marino connects to TIM's network — the same infrastructure AT&T and Verizon route roaming through. GDPR does not change connection speeds, pricing, or data limits. Both carrier roaming and travel eSIMs log metadata (connection times, data volumes) as part of standard carrier operations. GDPR applies to the provider's handling of that log data, not to your browsing or usage.

AT&T: $70/week (International Day Pass at $10/day). Verizon: $70/week (TravelPass). T-Mobile: free at 256 Kbps or $105/week for usable speed. The cheapest eSIM for San Marino starts at $0.86/GB on TIM's 5G network — better per-GB value than all three carriers.