The Hologram Network Team has identified an issue with TCP settings on the carrier side that only affects Cat-M and only in certain areas and certain carriers with certain servers. We’re working with the carriers to resolve the issue and hope to have more information soon. We appreciate your patience on this and those of you who have submitted diagnostic reports to us as these were helpful to help look into the issue.
In the meantime, there is a workaround to use PPP instead of the TCP stack on the modem itself which is what calling the connect function does. Note that doing this does open you up to the possibility of increased data usage since it may cause extra traffic to be routed over that connection. Just something to be aware of and keep an eye on.
We’ll keep you all posted as we work with the carriers to resolve this issue.