RedSim does not provide a plan with truly unlimited high‑speed data for Laos. All of the Laos‑specific offerings have a fixed data allowance that is capped after a certain amount of daily or total usage, after which the speed is throttled to a lower level.
If you need a large data budget, RedSim offers fixed‑data plans such as the 50GB 30 days plan at $57.95 USD or the 20GB 30 days plan at $26.96 USD. These plans give you high‑speed data up to the stated amount, and once the limit is reached the connection speed is reduced (for example, the 50GB plan drops to 384kbps). A short‑term option is the 10GB/day 1 day plan, which allows 10GB of high‑speed data in a single day before the speed lowers to 384kbps for continued use.