ByteSIM does not provide a truly unlimited data eSIM for Guam. The plans that carry the “Unlimited” label actually limit high‑speed data to 1 GB per day; after that limit is reached the speed is reduced to 10240 kbps. These plans are sold for 4 days at $25.00 USD and for 7 days at $36.00 USD.
Instead, ByteSIM offers fixed‑data options that give larger total amounts of high‑speed data in a single purchase. For example, a 20 GB plan is available for 3 days, 5 days, 7 days, 10 days, or 15 days with prices ranging from $58.90 to $78.00 USD. Choosing a fixed data plan can be more cost‑effective unless a traveler expects to use high‑speed data continuously for many days.