Make sure that Roam is set on the Data roaming options field:
Go to: START > SETTINGS > NETWORKS & INTERNET > CELLULAR. In the field “Data roaming options”, choose Roam.
WARNING: if you have carefully followed previous steps, your Ubigi eSIM profile is now used for the cellular data connection (and NOT your physical SIM card if you have one, or any other eSIM profile). This means that you won’t have extra roaming costs as Ubigi rates will be applied while using the Ubigi cellular connectivity. In any case, always ensure that your Ubigi eSIM profile is selected for cellular data to avoid extra roaming costs while abroad.