For our office I need a device with DynDNS function - officially, this router also has such a function. When setting I had festellen that you can choose as a provider auschießlich DynDNS.org. Other DynDNS provider, let alone a custom provider (just as you would for example FRITZ boxes knows) are not supported !!
Who does not need DynDNS, which makes this device certainly nothing wrong, the LTE reception was really good (therefore also + 1 Star) who wants to use DynDNS and has not just a DynDNS.org account that should not have access.