What Software for ADBB-GTA

I'm new here and this is my first post.
my mother tongue is german and my english is not very good.

My problem is this.
I received a new modem from my Internet provider A1.
Unfortunately, the original software from A1 is very limited.
So I'm looking for alternative software.
Searching on Google I came across this page.
My modem is an A1 VV 2220 called ADBB-GTA with Lot N: T-/20 and P/N: 151164901.
I did not find this device in the hardware list for your alternative software.
Hence my question. Which software can I use and which files do I have to install and how?

Thanks in advance

Then it's not supported.