eSimfly does not provide an unlimited‑data eSIM for San Marrino. All the listed plans have a set data cap and a fixed validity period. Travelers can choose from large‑data fixed plans, such as the Global 100 GB 31 Days plan, which offers 100 GB of high‑speed data for 31 days, or the O2 Unlimited (International) option, which gives 35 GB for 30 days. These fixed data plans are typically more cost‑effective for most users, and if a traveller needs additional data beyond the cap, the plan’s speed will be reduced rather than the data become unlimited.