MeSIM does not offer a plan that provides truly unlimited high‑speed data in the United States of America. All of the plans listed under the name “unlimited” give a fixed daily high‑speed allowance, after which the speed is throttled to a lower level (384 kbps or 512 kbps). This means the amount of high‑speed data you can use is capped, even though the plan label says “unlimited.”
Travelers who need extensive data often choose one of MeSIM’s fixed data plans. For example, the USA 3‑day unlimited eSIM (1GB/day high‑speed) costs $9.35 and offers 1 GB of high‑speed data per day for three days, while the USA 7‑day unlimited eSIM (3GB/day high‑speed) costs $18.04 and provides 3 GB per day for a week. Fixed data plans can be more cost‑effective for most users, unless you require a very large volume of high‑speed data.