Apple Wiki
Apple Wiki

The iPhone TTY Adapter is an adapter from Apple that plugs into the headphone jack, and allows the user to connect TTY devices for the deaf to iPhones.


TTY devices can range from classic teletypewriters to texting terminals specifically designed for the disabled. TTY support was built into the iPhone 6, negating the need for the adapter on later models, but Apple continues to sell it for US$19. On devices without a headphone jack (such as the iPhone 7 and later), only a Lightning to 3.5 mm Headphone Jack Adapter is needed.[1] iPhones running iOS 11.2 or later also support the real-time text (RTT) protocol.


  • This adapter has been available since the first iPhone was released in summer 2007.[2]
  • Unlike most Apple adapters, which are usually white, this one is black.


  1. Revisiting the forgotten history of obscure Apple accessories by Michael Steeber, 9to5Mac. 2018-03-19.
  2. Cables & Docks, Apple Inc. Archived 2007-07-02.

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