RedEx eSIM does not provide a true unlimited data plan for Montenegro. All of its offers list a finite data cap, ranging from 1GB to 200GB, and the plans are tied to specific validity periods. Travelers who need a large amount of data can choose fixed data plans such as the 200GB plan valid for 30 days, the 100GB plan valid for 30 days, or the 100GB plan valid for 365 days. These options give a substantial data allowance without a hard daily cap, but they are not unlimited.