eSimfly does not provide a truly unlimited data eSIM for Guam. The plans that carry the name “Guam Unlimited” actually supply 3 GB of high‑speed data each day; after the 3 GB limit is reached the speed is throttled to 1000 kbps, so the data are not unbounded.
For travelers who need more data over a longer period, eSimfly offers fixed data plans. For example, the Guam 20 GB 30 days plan provides 20 GB of high‑speed data for 30 days, and the Guam 10 GB 30 days plan gives 10 GB for the same duration. Fixed plans can be more cost‑effective unless a user is an extremely heavy data consumer.