The cell tower leasing consultants they hire are very charming and friendly and may remind you of you brother, cousin or child. Some are fine people who are just doing their jobs. Many of them are sharks who smell a quick buck and would shove you down a flight of stairs for a nickel. Either way they do not work for you... They are hired guns that work for the carriers and the tower companies.
While the purposes of letters of intent will vary from situation to situation here are a few examples of why a letter of intent is used: To come up with and provide safeguards for the interested parties in the case of a potential deal falling apart.