1. AC Question's Avatar
    Settings/call displays a lot of options but hearing ais not there..this is a factory unlocked model connected to Consumer Celluar..all other functions are OK...
    03-31-2015 10:09 PM
  2. itguyjax8430's Avatar
    Settings/call displays a lot of options but hearing ais not there..this is a factory unlocked model connected to Consumer Celluar..all other functions are OK...
    It looks like its a known issue.

    http://forums.androidcentral.com/htc...mode-help.html
    04-01-2015 08:30 AM
  3. itguyjax8430's Avatar
    TTY Settings - The all new HTC One® (M8)
    [Device-Specific Instructions]
    Note TTY Settings allow Text Telephone devices (TTYs) to be enabled so that deaf and hard of hearing customers can use the telephone by utilizing a visual, instead of auditory, mode of communication.

    From a Home screen, tap Apps Apps icon (located at the bottom).
    Tap Settings.
    Note If unavailable, tap the dropdown menu Applications dropdown menu icon (located in the upper left) then tap Alphabetical. If still unavailable, refer to Manage App Icons.
    From the DEVICE section, tap Call.
    From the OTHER CALL SETTINGS section, tap CDMA call settings.
    Tap TTY mode.
    Select the desired TTY mode:
    TTY Off
    Disables all TTY settings
    TTY Full
    Enables all TTY settings
    TTY HCO
    Enables HCO (Hearing Carry Over)
    TTY VCO
    Enables VCO (Voice Carry Over)
    04-01-2015 08:37 AM

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