The unveiling took place in the final few seconds of the season 8 finale, as Milioti's yet-unnamed character simply walked up to a Long Island Rail Road ticket booth to purchase one ticket to the fictional Farhampton, presumably to go play in the band at the impending nuptials between Barney (Neil Patrick Harris) and Robin (Cobie Smulders).
Years later, when they were vacationing at a private island in Fiji and staying in rustic cabins with no telephones, Milchan managed to find a phone booth by the reception area where he spent half the day making calls.