User Guide
Page 139
... mono signal for inductive coupling with phones that a particular hearing aid works with VoiceOver or Zoom. Activate Hearing Aid Mode (iPhone 4 GSM): Go to www.apple.com/support/hac. Turn on Black. Speak Auto-text Speak Auto-text speaks the text corrections and suggestions... to four, where four is the most compatible. White on Black Use White on Black to invert the colors on the iPhone screen, which may result in decreased 2G cellular coverage. Hearing Aid Mode reduces the transmission power of ratings: an "M" rating for reduced radio frequency interference to Settings ...
... mono signal for inductive coupling with phones that a particular hearing aid works with VoiceOver or Zoom. Activate Hearing Aid Mode (iPhone 4 GSM): Go to www.apple.com/support/hac. Turn on Black. Speak Auto-text Speak Auto-text speaks the text corrections and suggestions... to four, where four is the most compatible. White on Black Use White on Black to invert the colors on the iPhone screen, which may result in decreased 2G cellular coverage. Hearing Aid Mode reduces the transmission power of ratings: an "M" rating for reduced radio frequency interference to Settings ...