No, nextSIM does not provide a truly unlimited data eSIM for Bosnia and Herzegovina. The plans that include “Unlimited” in their names actually offer restricted high‑speed data allowances—such as 1 GB or 2 GB—after which the speed is throttled (for example, reduced to 512 kbps or 2000 kbps).  
For travelers who need a larger or truly unlimited data allowance, nextSIM offers fixed data plans instead. A 100 GB plan for 30 days or a 50 GB plan for 30 days are available for Bosnia and Herzegovina, providing ample data without the reduced speeds that apply to the “Unlimited” offerings. These fixed‑data options can be more cost‑effective unless a user requires very high‑volume data usage that exceeds the caps of the “Unlimited” plans.