One would think that only the iPhone 4S with its faster dual processor would be best suited for running Siri, Apple’s voice assistant for the iPhone. But it isn't the case. Steven Troughton-Smith, a developer who has been at work closely with 9to5mac porting Siri to the iPhone 4 was able to get Siri from the 4S onto the iPhone 4 after copying the Springboard files to it. The video below shows Siri working on the iPhone 4. He states that the iPhone 4 hardware is well capable of handling the workload of the Siri voice client. Siri requires an internet connection to work. This is because the data from the iPhone is to sent to servers which then process what you’re saying. Siri detects the voice commands and it manages to speak back to the user as well. Siri as a feature isn’t fully available users outside the US.
Apple’s iPhones authenticate with Apple’s servers before gaining access to the server. Apple servers simply knock down any requests that come from devices other than the Apple iPhone 4S. A similar system might be in place to stop access to the service by those using the 4S from outside the US. So even though, you might be able to get the app running on your iPhone, it’s likely to be useless until hackers find a way to cloak the iPhone 4 as the iPhone 4S.
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