I read on a JW site that they do phone field service now. I wonder where they get the names and phone number from ?
From the telephone book. Our congregation had a small group (including myself) who met at the KH every Saturday for a couple of months and went through the phone book looking for addresses that were in our territory. Then we wrote down the names and numbers in a book and passed them on to another group who made the actual phone calls. We were allowed to count our time looking through the phone book as field service.