nextSIM does not provide a truly unlimited high‑speed data plan for Guinea. The plans titled “eSIM Unlimited Standard” and “eSIM Unlimited Plus” each include a fixed allowance—1 GB or 2 GB—after which the connection speed drops to 512 kbps or 2 000 kbps. If a higher data usage is required, the speed automatically throttles once the cap is reached.
For travelers who need more data without speed reduction, nextSIM offers fixed‑data plans such as 10 GB for 30 days at $141.11 USD, 5 GB for 30 days at $76.68 USD, or 3 GB for 30 days at $46.30 USD. These plans provide a stable data allowance for the entire validity period, and may be more cost‑effective for users who expect moderate to heavy data consumption in Guinea.