No. nextSIM does not provide a plan that offers truly unlimited high‑speed data in the United Kingdom. Every plan listed under the “Unlimited” name caps the data at 1GB per day or 2GB per day and then reduces the speed to a specified lower rate, such as 512 kbps or 2000 kbps, once the daily quota is used.
For travelers who need more extensive data without speed limits, nextSIM offers fixed‑data plans instead. Examples include the 50GB 30‑day Economy plan and the 40GB 30‑day Premium plan, which deliver a large, flat amount of data at full speed for the entire validity period. These fixed‑data options can be more cost‑effective for lighter or moderate data usage compared to the capped “Unlimited” packages.