[mudetroit]

Typically speaking, all of the wiring is done in some central location for the building. The phone/electric/cable companies don't want to make individual drops to each unit. They make one drop to the building and then fan out to the individual units. All that changes when a new provider comes in is that they make a drop to the building and then connect the units wiring to it. They do not need to wire to each individual unit.

The level of complication for making the initial drop to the building will vary depending on the area and how wiring is done in general there, areas where there are pole hung wires making the drops are pretty quick to add areas where the wires are underground are typically a little more complicated.