>Has Jibe somehow blacklisted his phone? In that case, Apple might technically be right — it’s a carrier issue, but with all major carriers, since he says they’re all using Jibe on the backend.

That's my guess, yeah. The only unrelated carrier I haven't tried yet is Boost/DISH. I can hop networks on US Mobile but I don't think it'll help. So far I've tried 3 T-Mobile lines on this phone, the US Mobile line on AT&T's network, and my mom's Verizon Wireless line.

> Anyway, I doubt he’d sound crazy, as he puts it, to the Apple Store people making this case.

It's difficult: I probably should have had a write-up before going in, my list in the blog is not complete of steps I tried to get this going. Understand though that all the user facing and employee facing documentation says if it's RCS it must be the carrier.

Had an awesome senior support agent a few calls ago that knew what he was talking about. Actually described previous issues where RCS would not activate early in iOS 26 with a single sim user that had an inactive but not deleted eSIM. I believe the store also repeated a similar mention today.

The senior support agent on the phone just hadn't gotten to the point of fully ruling out an on-phone software state issue. What I mean is I restored a backup from iTunes that their diagnostics reported as incompletely restored. So after our call he wanted me to either try that again or do an iCloud backup. I did the latter, since it seemed to be described as a different restore process that's less likely to copy back a broken state to the device.