Go through the boathouse and the first greenhouse. Look on the wall where you 
  shoot the helicopter to find a phone.
  Go towards the mansion on the left. Look on the table with the chairs to find 
  a phone.
  Enter the mansion from the cellar. Look near the steps to find a phone.
  Go through the wine cellar, and enter the black and white tiled area. Look on 
  a table to find a phone.
  Go through the mansion's kitchen and dining room. The next room has stairs. 
  Look between the vases on the raised area at the base of the stairs to find a 
  phone.