I saw in video if you are texting someone or in your address book and you place the phone to your ears it will auto answer the call. If there a feature that allows you to auto answer any calls when you place it to your ears?
Not really. There's a feature that allows you to place a call to the contact you're currently viewing by just taking the phone to your ear, without having to press the "Call" button, but not answer incoming calls.
Another feature, however, does allow you to answer an incoming call by just waving your hand over the phone, but this would answer the call on loudspeaker.