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# What is an eSIM and why use one?

An eSIM (embedded SIM) is a digital alternative to a physical SIM card. It allows you to activate a cellular plan directly on your device without needing a removable SIM. It’s especially helpful when traveling, as you can activate and use mobile data anywhere in the world.

###### Benefits of using a travel eSIM:
* No physical SIM swapping needed
* Set up before you travel
* Instant data access upon arrival
* Keep your original SIM active for calls/SMS while using the eSIM for data
* Easily manage and switch between multiple plans
* Lower costs than traditional roaming
* More environmentally friendly — no plastic waste