I am trying to connect a GPS tracker TK104.
I bought a Hologram SIM card and I activated the SIM card via dashboard: I also bought a German telephone number which is now associated with this SIM.
If I call the new telephone number I keep getting the message " the call number is not connected".
If I send an SMS to the German telephone number and I receive an answer from the device, but the answering number is very strange +88236…
My problem is that I need the possibility to call the device even it is not answering. It recognized the calling telephone number and if the number is in the allowed list it responds with the GPS coordinates.
Does someone have experience with a similar setup? Where do I find the related technical information to the Hologram SIM? Is it just possible to send SMS? Why is my device not ringing?