The application was extracted from a developer’s unit of the SGS III, and just as we thought that the feature - advertized as unique for Samsung’s new flagship - has made its way to all Android devices, the Koreans along with Vlingo started blocking server requests from unauthorized phones. Vlingo is the company behind the S Voice feature.
At the moment we start using S Voice we are sending all the following info to them:
X-vlclient: DeviceMake=samsung; DeviceOSName=Android; DeviceModel=Galaxy Nexus; DeviceOS=4.0.4; Language=en-US; ConnectionType=DirectTCP; Carrier=[my Carrier]; CarrierCountry=[my Country]; DeviceID=[my IMEI]; AudioDevice=Android
Looks easy to them to deny the requests from the phones other than Galaxy SIII. And they are doing this obviously, look at the response:
184.108.40.206 10.8.0.1 HTTP 340 HTTP/1.0 404 Not Found
Expert Info (Chat/Sequence): HTTP/1.0 404 Not Found
The hackers community is looking for a workaround, but in the meantime it seems that the Galaxy S III will arrive with S Voice exclusive to it.
source: XDA Developers via The Next Web