I updated to 4.4 Dec 2016, now my sync goes completely out every 6-8 weeks. I paid my deductible for my extended warranty in February to have it fixed the first time, dealership reinstalled software. April it goes out again, call tech support and was told it wouldn't be fixed till a software update was released, so I called Ford customer support to ask for a refund for the repair. Ford Customer support refuses the refund and insist there is no software issues. Was told they would talk with there engineers to come up with a fix, waited six weeks till I was contacted, Ford said they had the dealership delete the software and then reinstall. July it goes out again, Ford still claims its not a software issue, take it to the dealership. The dealership said Ford told them to disconnect the battery to force a hard reboot. Now I'm concerned that Ford has no intentions of honoring there extended service plan. Will find out in the next couple of weeks when the sync system goes out again.