Saily does not provide a truly unlimited high‑speed data eSIM for Thailand. The only plan that carries “UNLIMITED” in its name, Thailand UNLIMITED 15 days, actually allows 5GB of high‑speed data each day before the speed drops to 1024kbps. After the 5GB daily limit, the data remains capped and does not stay unlimited.
If a traveler needs a larger data allowance, Saily offers fixed data plans that may be more cost‑effective. For example, Thailand 20GB for 30 days costs $19.99, and Thailand 10GB for 30 days costs $10.99. For those who travel beyond Thailand, a 100GB plan for 180 days covering Thailand and 18 other countries is also available for $179.99. These plans provide substantial data without the speed reduction that follows the daily cap of the “UNLIMITED” plan.