Glossary · Connectivity
What is a esim?
An eSIM is a digital SIM built into your phone that you activate by scanning a code, with no physical card to swap. For travel, it lets you buy a local or regional data plan before you land and switch to it on arrival — keeping your home number active.
Check that your phone supports eSIM and is carrier-unlocked before relying on one abroad.
Related terms
Updated June 29, 2026
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