Stay private on public Wi-Fi abroad — VPN + eSIM.
An eSIM and a VPN solve different problems, and conflating them is the most common mistake in this category. A travel eSIM gives you mobile data abroad without a physical SIM swap and without roaming charges. It is a connectivity product. It does not encrypt your traffic, hide your location from apps, or stop the network operator seeing which services you connect to. What it does do for privacy is indirect but real: having your own mobile data means you are not dependent on hotel, airport and cafe Wi-Fi, which is where most of the actual risk on a trip sits. Pair it with a VPN and the split is clean - the eSIM decides whose network you are on, the VPN decides what that network can observe. When comparing eSIMs, the things that matter are which countries and carriers are covered, whether data expires, and what happens when an allowance runs out mid-trip.
An eSIM covers the connection abroad; a VPN covers what is visible on it. They are complementary, not alternatives.
Unidata is a portable travel hotspot for mobile data abroad — no local SIM to buy or swap.
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