Yes, MicroEsim offers unlimited data eSIM plans that cover San Marino. The unlimited options are found in the Europe eSIM 36 Countries product line and are available for validity periods ranging from 1 day to 30 days, with prices from about $2.75 USD for a 1‑day plan up to roughly $64.89 USD for a 30‑day plan. Each plan has a maximum speed of 10 Mbps, but the network may throttle speeds after excessive use.
Because the unlimited feature limits only the high‑speed data share, once that share is exhausted the connection slows to 128 kbps. Travelers who want details on the Fair Usage Policy, the typical threshold for throttling, or any other questions should contact MicroEsim directly to confirm how the policy applies to their usage.