We live in the woods and have to have a land line- no reception for cell phones including __Do you hear me now? brand.
We got the cordless ones with 3 extensions ( got them at walmart). So there is one between DH's chair and mine in the great room, one in the kitchen and one in the loft which is my sewing area.
We also have caller ID. If we don't know the number, we don't answer it!