So I've seen a good deal of traffic about IPhone X's not working with CarPlay in Honda's with no real resolution. There appears to be something nefarious going on with Apple or Honda or both not resolving this problem. It's been an issue for over a year now.
Here's a summary of the issue:
IPhone X will not connect to CarPlay. If you delete the car from the phone and the phone from the car, you can occasionally get it working again, but it eventually fails again. Other supporting facts:
1. Using the Apple factory supplied cable. (Used several different ones in fact.)
2. I took the same cable and same phone on vacation with me in October 2018. I used them in 2 different GM vehicles (Chevy Cruze and Chevy Tahoe). I both cases CarPlay worked flawlessly.
3. I still have an old IPhone 5S v12.1. It works flawlessly with CarPlay in my Ridgeline, using the same cable that I use with the IPhoneX.
4. Right after I got my IPhoneX about 9 months ago, I assumed it to be a phone problem since my 5S and 6S worked fine, so I made Apple swap out my IPhoneX for another one. The problem did not go away.
5. I've been to 2 different Honda dealerships on this issue. The first one about a month ago did not acknowledge being aware of the issue and said they would contact "the factory" for consultation. After 3 weeks of crickets from them, I went to a second dealership. This one was aware of the problem and seemed all to eager to lay it at the feet of Apple (which may be entirely appropriate.) He went so far to tell me: "Android phones work fine in our vehicles."
6. Dealer today gave me a website:Handsfreelink.comand phone number888-528-7876. I haven't called yet, but did go to the website. Interestingly when you try to describe your vehicle and what phone you are using, it plays out at IPhone 7.... no IPhone 8's or X's listed. I thought this might be a car model year issue, so reset it from my 2017 model Ridgeline to a 2019 model year Ridgeline. Same result, nothing beyond IPhone 7 is listed.
7. This clearly seems to be some sort of speed-related, handshaking issue on initial phone connection, and it needs to get fixed!
8. As ridiculous as it seems, I'm considering getting a phone number active again on my old IPhone 5S just to get the CarPlay to work.