This will depend on your Brazilian operator.
Some operatros may not allow you to use a SIM card or eSIM from another operator at the same time. We recommend that you always check with your Brazilian operator.
If you have a chip or eSIM from Claro S.A., you will need to remove your Brazilian SIM card or eSIM to use the Nomad Chip. After returning from your trip, you can reinstall your SIM card or reactivate your Claro eSIM using the QR code you received upon purchase, or by going to a Claro store.