This is what you need:-
software version: V100R001C01B030SP08
xdsl firmware version: A2pv6C038m.d24j
I wonder if it's possible that in the non-G.INP active modem you somehow have the correct software version, but an older firmware version?
Alternatively, as you suggest, leaving it connected overnight, G.INP may be enabled.
However, it is currently suspected that further enabling of G.INP has been temporarily suspended.
If that is the case, you may have to wait a bit longer for the non-G.INP modem to become enabled?