Several reports about Apple altering its requirements for Siri are causing people to wonder if the company is trying to block non-iPhone 4S devices from using the voice assistant. A new token is causing a problem for owners who are trying to connect using jailbreak tools like Spire.
Originally to get Siri to work on an non-iPhone 4S device you only needed a sever host and iPhone 4S certificate. However, according to several forums and Twitter, Apple has added a SetActivationToken which is causing issues with 3rd party servers. Thankfully their seems to be a temporary workaround.