I did a quick search for the SIII if it is supported by MFT and it is not listed. However, it doesn't mean you cannot use the speech to text feature. I would first find out if anyone else is using the same phone without any issues. If others report no problems, then perhaps a factory reset may fix the issue. (Just a suggestion and as a last resort). If this was working fine before the update, take it to the dealer and see if they can downgrade the version to the older one. You may also wait for the updated software to re-appear again, Ford took down the update due to issues with the climate control. No ETA yet of when they are planning to release the software.
2012 Focus Titanium Black Manual