April 29th. It is on UK download page under 2760. "G.INP /Vectoring beta firmware"

I have also tried 574307: - Modem code 574307 has vectoring (G.993.5) enabled for test purposes.
Vectoring and G.INP are provided for test purposes only and are not part of the official
specification currently. If your line does not support either then the modem code
will still operate.

No speed increase discernible though I am 650m from cabinet (Huawei installed about 6 months ago).

Many thanks i guess must be fixed and the session issue as well then
However i am only with adsl, but as always i may give it a go
I am sure it will Not harm my adsl line the vectoring g. inp firmware