Not true. My taman is a V cabinet and I just registered for 5Mbps Unifi. Will be installed this Friday.
The box is only 1 part of it. There are still a lot of stuff needs to be done.

In my case after the box (and rage why so long still haven't open registration), they still need to pull the cables to each pole in the taman. They also renovate the existing phone cylinder and add some more complicated stuff. After that once in a while will see people come to the main box with their laptop. To check the line I suppose.

The box is not all you need for connection.

P/S: I registered on October and saw the box on February I think.