No, VeloeSIM does not provide an unlimited data eSIM plan for the Balkans. The available options are fixed‑data plans, such as a 50GB plan for $29.99 USD and a 20GB plan for $19.99 USD, each valid for 30 days and covering Albania, Bulgaria, Croatia, Montenegro, North Macedonia, and Serbia. Choosing a fixed‑data plan can be more economical unless a traveler requires very high data usage, in which case the cost of higher‑cap plans may be justified.