Hybrid connect is part of a package and comes with the smart hub and the mobile connection interface.
It allows you to get online as soon as the kit is received, by allowing the smart hub to connect to the internet through the mobile phone network.
When your broadband connection is made it switches to that. The hybrid box then remains in your house as a backup connection device.
You would keep it as part of the halo 3+ package.
G.Fast would give you speeds about 4 times faster than the fastest 'fibre broadband' so its certainly a significant improvement, but you would have to change the master socket (which would be really quick and easy and no landlord would complain 🙂 )
The 'phone line' is already there, when you order from BT it would be activated with a telephone number but you can just ignore it if you dont want to use it.
