iPad, iPod, iPhone for people who are deaf and hearing impaired
The iPad, iPod, and iPhone can direct auditory content from left and right audio channels in both earpieces. This allows users with a hearing impairment in one ear to listen to both audio channels in each ear simultaneously.
You can also modify the audio balance between both left and right audio channels.
Messages with iMessage
Send unlimited messages with iMessage (without a subscription). Share videos, photos, locations and websites with friends. And thanks to group messaging, everyone can stay updated.
Flash LED for Notifications
Make your device’s LED diode blink to alert you of incoming calls and notifications. Or, make incoming calls display a full picture of the caller on the screen.
Settings/General/Accessibility/LED Flash for Alerts
Ambient Noise Suppression
The suppression of ambient noise reduces parasitic sounds when you are in a call in a noisy environment.
Settings/General/Accessibility/Phone Noise Cancellation
Another document will compare Facetime, Skype and Oovoo.
Three applications will allow you to make video calls online.