Thanks for taking the time to dive into this Lotus!
I appreciate it!
There was nothing to restore on this ipad, so I just did a factory reset.
Did a fresh 12.5.5 install, and created a brand new Apple ID just for testing.
I created a new icloud email account for this ID.
Can you confirm your model# on the ipad Air? Mine is A1474.
And also, are you in the USA?
Could it be possible that Facetime and message work in other countries but is geo-blocked in the USA?
I've gone through every setting i can find in system preferences and nothing makes a difference.
It just gives the little spinning icon for both services and never connects.
To confirm, i can connect to the internet via wifi just fine, and also connected to Apple music fine.
I don't have much faith Apple will help.
Last time i tried to buy a replacement battery for this same ipad they told me that it was impossible, as it has to go back to the factory, but they could sell me a refurbished one for $350 with the trade in. I declined, and took it to a local tech place and they replaced the battery in 30 minutes for $60.
I might give them a call, as I'm at my wits end with this.
Thanks again, i didn't expect anybody to answer a post regarding such an old device.
It certainly is a mystery though.
Cheers!
Dan