I installed my new SpeedPort Hybrid modem, and the DSL is working, but the LTE is not lighting.

I have called tech support and they were supposed to call me back, but have not.

The router is giving this error for LTE :

'There's a connection error.Do you use your Speedport at the address to which your Internet connection was provided? You can find the address in the order confirmation. A LTE connection is only possible at the address specified there.'

Can ANYONE help? I also did not get my SIM card in the mail. I picked the card up at the Telekom Shop in the downtown.