Why would you turn data off?my gs3 is in 4g 24/7 whats the point of this thread when you are purposly making the cell not work the way you want.
So you want the cell to call someone but you dont want data on while doing it?
I just tested it using google search and said call bro and it worked with data and wifi off.
I dont know what your talking about.I can also tell the phone to open apps etc
Re-read the OP. There are plenty of places where you can make a voice call without reliable data service. Offline voice recognition continues working fine. The newer stuff that relies on a server to process it does not. Siri often says that she "can't help you right now." I don't even have an iOS device and yet I hear that one often enough.
Similarly, when I get near a McDonald's or other WiFi restaurant or retail store with WiFi, I suddenly can't make calls because I have my phone set to use Google Voice and the phone's native dialer hangs waiting for GV to connect. It never will connect unless I open my browser and accept the place's WiFi agreement; which I usually can't do because I'm outside and the signal is too bad. Hell, it even does this when I am trying to let my brother know I'm outside his apartment and I need him to come let me in (hops on his weak/distant WiFi from the parking lot or outside the back of the building; fails to obtain an IP address). Android fails by not having a simple "Connect automatically?" option to disable for each WiFi network (especially public... grrr), but that's not the point.
The point is that things like this don't gracefully fall back from WiFi to cellular data to a local alternative when there is a problem. Siri, Google Now, and S-Voice should all transparently try WiFi (if connected), then cellular data, then fall back to a limited local voice commands if the server is not available (same as before these things were processed on the server side on older handsets).