My neice moved into a new build flat, its has a white bt phone line and
BT will charge £122.50 to activate it! which sounds like a lot of money
to me.

All the wiring is done and there is a phone line 3 rooms. Which seem to
be wired up to a grey box on the outside of the property.

There is no dial tone when a phone is plugged in.

Is there anyway I can activate the line or does this require some
special equipment to do ?

Hoping to try and save her some money as its her first home.