No, nextSIM does not currently offer a truly unlimited high‑speed data eSIM for Australia. All of nextSIM’s so‑called “Unlimited” plans list a fixed data cap of 1 GB or 2 GB (or 1 GB per day, 2 GB per day, etc.) and specify that speeds are throttled to 512 kbps or 2000 kbps once the limit is reached.
Instead, nextSIM provides fixed high‑capacity options that can give users up to 40 GB of data in a 30‑day period, such as the “eSIM GLOBAL 40GB 30Days Premium” plan. Those plans supply a larger data allowance without a speed reduction until the data is used up. Choosing a fixed data plan may be more cost‑effective for heavy data consumers than the weighted “Unlimited” options.