SimSIM gives you mobile data through a digital eSIM. Choose a plan for your destination, install the eSIM on your phone, and use it as your travel data line.

## What you can do

- Browse country and regional plans.
- Check whether your device supports eSIM.
- Install a purchased eSIM from the app.
- Monitor data and validity.
- Add data when your plan supports top-ups.
- Get help with account, payment, and connection issues.

SimSIM is data-only. Keep your regular SIM active for your phone number, calls, and SMS, and use SimSIM for mobile data.

## Start with a guide

- [How SimSIM works](/hc/help/articles/en-how-it-works)
- [Check device compatibility](/hc/help/articles/en-device-compatibility)
- [Buy a plan](/hc/help/articles/en-buying-a-plan)
- [Install your eSIM](/hc/help/articles/en-activating-your-esim)
- [Troubleshoot a connection](/hc/help/articles/en-troubleshooting)