JettโOn does not provide an unlimited data eSIM for Montenegro. All active plans are fixedโamount packages, with the largest option providing 30โฏGB of data for 30 days. For travelers who need a high volume of data, you might consider one of these plans, such as the 30โฏGB plan priced at $43.00 USD or the 20โฏGB plan at $32.00 USD, both of which offer tethering and have 3G/4G coverage within Montenegro. Fixed data plans can be more economical for moderate to heavy usage compared to an unlimited plan, particularly if your data consumption is below the amount of a highโvolume package.