When traveling from Paris to the Alps by highspeed train this winter we found this sticker above our seats.
It looked like a shy mobile phone to me at first, but it’s true meaning became clear when I needed to visit the toilets later on and came across the yellow sticker.
It was above a cosy bench in the corridor between carriages. A special corner for making calls! So this is how to do it:
The only tricky bit is that your cosy bench is doubling as a baby change unit. I’m not sure the babies will stand in line until you finish your call. If not, close your nose!