nextSIM does not provide any true unlimited‑data eSIM plans for the Czech Republic. All plans listed under the “unlimited” label actually limit data to 1GB per day or 2GB per day, after which the speed is throttled to 512kbps or 2000kbps.  
If you need a larger data allowance, nextSIM offers fixed‑data options such as 100GB for 30 days or 50GB for 30 days, both with full 3G, 4G, and 5G speeds and no post‑cap throttling. Choosing a fixed‑data plan may be more cost‑effective unless you plan to use a very high amount of data beyond the daily limits of the “unlimited”‑named packages.