So. 

For the first time in a long while I am to a location without any 4G or LTE - only 3G. Unfortunately, no matter what I do, I am failing to coax my iPhone 11 even as close as to receive/send any data over it including switching voice and data on the phone’s secondary line (the one with a plan for roaming) to 3G. Text messages seem to go fine.

Here are my current data configuration:

[![main mobile data screen][1]][1]

[![secondary line data screen][2]][2]

Is there anything possibly wrong with the configurations that might be a quick fix? Is this a known issue?

  [1]: https://i.sstatic.net/RIOsm.jpg
  [2]: https://i.sstatic.net/Ru70y.jpg