Hello I have a Webasto Thermo Top Evo heater with Webasto ThermoCall Tc 4 Advised App. My problem is manually I can turn on the heating only via the app I can not get it to run. I have already used different sim cards, changed the pin on the Sim to 1234, always comes the message ( Number not registered, no command is executed. ) Have the battery already disconnected everything helps nothing. I searched already everything but you can find nothing about the message on the Internet. Somebody got a tip for me.