eSIMCard does not provide a truly unlimited high‑speed data eSIM for the United Kingdom. Every plan listed under the “Unlimited” name includes a data cap—either 1GB or 2GB per day—after which the connectivity speed is reduced to 512kbps or 2000kbps. These plans are labeled as “Unlimited” for marketing purposes but the high‑speed data is limited.
As alternatives, eSIMCard offers fixed‑data plans such as a 50GB Data & Unlimited Minutes plan and a 35GB Data & Unlimited Minutes plan, each valid for 30 days. These plans give a large, unthrottled data allowance and can be more economical for travelers who need a substantial amount of data. The examples mentioned are only a subset of the available fixed‑data options and not a comprehensive listing.