ByteSIM does not provide a true unlimited data model for Poland. The plans marketed with “Unlimited” in the name actually offer a fixed allocation of 1 GB per day; after the daily limit is reached the speed drops to 10240 kbps. Therefore these are not unlimited high‑speed plans.
Customers who need a larger amount of data can choose from ByteSIM’s fixed‑data options. For example, the 50 GB packages available for 3, 5, 7, 10, or 15 days provide a consistent high‑speed data allowance and, because the entire data cap is available at the start, they can be more cost‑efficient for heavy users than repeatedly renewing the daily limited plans.