MeSIM does not provide a truly unlimited data eSIM for the United Kingdom. All of the plans listed for the United Kingdom have a hard data cap, such as 500MB/day, 1GB/day, 2GB/day, or 3GB/day, and the “unlimited” label refers to the ability to continue using data after the high‑speed allowance at a throttled speed.
Travelers who need a large amount of data can choose from MeSIM’s fixed data plans, such as the 500GB/90 days, 200GB/30 days, 100GB/30 days, or 100GB/180 days options. These fixed plans offer a substantial data allowance and can be more cost‑effective for most users unless they are extremely heavy data consumers.