In the 80`s (no mobiles back then) one of my family members used to use a UK public telephone box to speak with me sometimes for an hour or more.
I used to go down to PLDT and then call the telephone box number through the Filipino operator advising her that the other end would be paying..
When she got through she asked "Mr bloggs" would he accept the charges..He very kindly did and like I say we spoke for ages.
That scam lasted about a year using different tel boxes each time.
BT have ripped me off ever since!!