InnoCaption is working hard to make calls more accessible, and we now have a feature called Caption my speech. This feature allows you to receive captions for the other party's speech and your own.
To use Caption my speech on an iPhone and Android Next Gen (New v4.0)
Open the InnoCaption app
Tap Settings
Tap Call preferences
Tap Caption my speech toggle ON (it will turn GREEN)
Tap Back (<)
Tap Keypad
Make a call using the keypad
Once the call is connected, you will be able to read captions for the other party's speech and your own