Error: Cellular plan can’t be set up, eSIM installation is unsupported on your device.
I am using iPhone 12 Pro, and have been using an eSIM from AT&T since I activated my phone last year. 2 days ago, out of the blue, I started getting "SIM Failure" popups and "Invalid SIM" in the status bar. AT&T shipped me a new QR code for the eSIM, but when I scanned it from the camera, I get the following error:
"Cellular plan can’t be set up, eSIM installation is unsupported on your device. " (see attached picture)
As expected, AT&T is clueless on what the issue is.
I've seen sporadic mentions of this error on these discussion forums, and they always have a post from an Apple expert to this page:
If Dual SIM with an eSIM isn't working on your iPhone
I've gone through this Apple Support page multiple times, and since my phone was working just fine a few days ago, nothing in the page stands out as to what the fix could be.
I couldn't determine if anyone has actually solved this error - can someone post what they did to resolve it?
Many Thanks!
iPhone 12 Pro