Nano CH340G + SIM7600E-H: LTE insufficient signal despite strong network availability

Sorry, don't understand. What are the "actual" names?
My celphone for example uses internet.v6.telekom which the telekom also recommended, however, the beeloggers said, that it does not work as beelogger does not support ipv6.
Can I find out, to which host name the card might be bound to?