Exito (Supermarket), Kennedy, Bogota, Colombia

Sorry there's no number. It wasn't obtainable as it now restricted to calling the stores chosen taxi firm.

+442085349341, 1st Floor, Westfield Shopping Centre, Stratford, London.

Phone did not ring loud but might get someone's attention of a busy weekend.

+34913235350, Madrid-Chamartin Train Station Entrance, Madrid, Spain

Here is another public payphone in Madrid, Spain. As usual, this one rings LOUD and the audio works OK both ways.

Located near Madrid-Chamartin train station entrance seen here on this Google Maps page.

Many thanks to Santiago for this fine contribution.