nextSIM does not provide truly unlimited high‑speed data plans for Greece. All plans listed in the catalogue have a fixed data allowance—either a set amount per day or a total cap for the validity period—and the speed drops once that limit is reached. For example, the eSIM Greece Unlimited Plus 1Days Standard plan gives 2 GB of 5G data per day and after the 2 GB limit the speed is reduced to 2000 kbps; the eSIM Greece Unlimited 10Days Standard plan offers 1 GB per day, with the speed dropping to 512 kbps after each daily limit is hit.
If a traveler needs more data, a higher‑cap fixed plan may be a better choice. One option is the eSIM Greece Unlimited Plus 10Days Standard, which supplies 2 GB of 5G data each day for ten days (speed throttled after the daily cap), and another is the eSIM Pro Greece 200GB 30Days plan, which provides 200 GB of 5G data for thirty days with no daily cap. These fixed‑data plans are often more cost‑effective unless the user is a very heavy data consumer.