No, our SIM's will not work in a Truma I-Net box.
Broadband Go offer a data only SIM, which means that they are incompatible with the Truma i-net system because the Truma i-net devices communicate using SMS only.
Although we do not recommend one SIM card over another, an example of a SIM that would work in a Truma I-Net device is below;
https://www.rwgmobile.wales/webshop/pay-monthly/free-100-mins-100-sms-plus-750mb-data/,