There is still the mobile phone!!
untill the phone network crashes that it have had it happen 2 or 3 times on me befor or what about if you cant get a signal? or the backup power supply to the phone mast dosnt kick in?
Depends on the quality and layout of the internal wiring. With Infinity you can only use the socket that the engineer installs.
I'm hoping this means (like my present master) that the new socket isolates the internal wiring in the flat and stops it interfering with the data signal.?