Hello everyone i just updated my sync 3 to 3.4 and its not official but i just to to let you know guys if you are waiting to update it’s totally worth it. Some claimed its laggy and not that responsive but let me tell you its very responsive and flawless. You also get updated map even though i use google map often. I used cyanlabs and its easy to follow guide.
https://cyanlabs.net/tutorials/update-ford-sync-3-2-2-3-0-to-version-3-4-all-years-3-4-19200/