I have a GPS tracker device that is programmed by SMS. I have been using the tracker with a vodafone SIM and everything appears to work fine.  When I changed to 2degrees SIM in the tracker, the text response from the tracker on my Samsung Note8 appears as "<<Content not supported>>".  The tracker receives SMS texts fine, and updates programs etc as expected.  I swap back to a vodafone SIM in the tracker and texts start appearing as normal. I have sent a help request to 2degrees but in the meantime does anyone have any ideas? 

Cheers

Barry