Is mobile data more reliable than my resort's Wi-Fi?

Yes, for mobility and privacy. While major resorts in St. George's or Grand Anse offer Wi-Fi, it is often slow, shared with all guests, and only works in the lobby. A personal eSIM gives you a private, fast 4G connection that works in your room, by the pool, and, most importantly, when you leave the resort to explore the island's waterfalls and beaches.