I've had my S4 for 3 months. It is my 6th smartphone. All my prior smartphones and even the dumb phones before them could make a call using only my voice when using a Bluetooth device. It seems to recognize the name I'm looking for, but it has trouble locating the entries in my contacts. For example, when I attempt to call my home I have said with prior phones "call firstname lastname home 1" and it would make the call, sometimes asking to confirm it was picking the right person. When I do this with the S4 and use my own name, it tells me "I found 9 entries for firstname lastname, ... or choose from the following 3 entries: wife lastmane, son1 lastname, son2 lastname" and it seems to want me to select using the screen instead letting me make the call hands-free like it is intended to be (and legal to do). Since it has clearly recognized the correct first and last names I spoke, I cannot understand why it then thinks my other family members match my name. This is totally bogus.
After my first month of this, I took it and my Motorola car bluetooth device into the VZW store and showed them how it doesn't work. They convinced me that I needed a newer Bluetooth device, so I spent $100 on a new Motorola device that supports the latest level of Bluetooth, but it doesn't work any better than my old device. What good is having the latest wiz-bang phone if even the simple stuff doesn't work. I've never had a problem making calls with voice on any phone in the past (dumb LG phones, two Blackberries, Droid X, an S3, an iPhone), and it makes no sense that it would require me to use the screen to complete calls I try to start using Bluetooth. It can't be a voice recognition problem because it repeats back to me the correct name, but then proceeds to look up incorrect names in my address book. I am not happy that I may have to go back to my Droid X just to get voice calling to work again.
Does anyone know how to make a call using only voice on the S4? The VZW store is not much help.