So for an old guy, that only wants basics, what's the advantages of using car play. I'm perfectly happy with ford's navigation and rarely listen to any music on my phone. When I first got the truck I'm almost positive, that when I received a text message, it said I received one and did I want to listen and reply. Doesn't do that now, but I may not have been on car play at the time. Thanks for your help.

 

I maybe a little off on this, but if it connected to CarPlay, there is no need to sync since it uses the phone. If you connect VIA Bluetooth then you can sync from phone to the truck. Then the truck will have the contacts in it.

 

I read your salesperson fixed the issue but for future reference for other iPhone owners with iOS 15, if Sync 4 seems to stumble with how it should connect and / or drops CarPlay randomly these steps will often resolve the issue immediately.

On iPhone:

Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings > Accept.

On Sync 4:

General > System > Master Reset.

I realize that this will clear all known network passwords off your iPhone but it solves many problems in general.
There is a difference between wired CarPlay, Bluetooth and WAPP.

Bluetooth automatically hands over the device to the Wireless App Projection Protocol if it's enabled in Sync 4 to add to the confusion. This is why establishing wireless CarPlay (via pairing with bluetooth) and disabling bluetooth immediately on the iPhone afterwards won't kill the wireless CarPlay connection.

An iPhone will show the Sync 4 system with different device names in phone's CarPlay directory depending on how it's connected to Sync 4.

My experience with the Wireless App Projection Protocol on Sync 4 is such that I only use a hardwired connection to my iPhone. Sync 4 (for me) behaves as though once a WAPP connection is established there's a memory leak and it keeps trying to handshake with the device its already connect to. I gave up on trying to make it work without a master reset every two months. I'll revisit wireless CarPlay once Ford decides to publicly release the update which exist for Sync 4. They've been rolling Sync 4 updates only to new-production F150's at the factory. It's incredibly frustrating and typical of Ford to do this.