Shortly after the new Siri-like voice assistant feature of Samsung’s new Galaxy S III, known as “S-Voice,” made its way to other Android devices via an available APK, reports claimed Samsung began to block non-S III users from accessing the service. XDA Developer community members confirmed (via TNW) that Vlingo, the company behind the voice recognition technology used in S-Voice, is now blocking users from trying to access its servers with devices other than the S III.

In December of last year, Nuance, the company currently powering speech in Apple’s Siri app on the iPhone 4S, acquired Vlingo. Samsung previously collaborated with Vlingo for the Voice Commander feature for the Galaxy S II. We expect Nuance has improved Vlingo since the acquisition, while Apple’s relationship with Nuance is not stopping Samsung from using the Vlingo technology. In an interview in October, Norman Winarsky, co-founder of Siri, told us Vlingo was originally used in Siri when it first developed, but noted it is rather easy for apps like Siri to implement new speech recognition technology if it comes along.

Samsung’s Galaxy S III recently hit Amazon for $799 and up, with a June 1 expected ship date.