Sharing my recent experience and steps I took to resolve an issue with Siri AI (Beta) producing the “uh-oh” error, despite syncing the region and language settings and flushing the Siri AI local cache on my iPhone 18 Pro Max running iOS 27.0.1.
After logging out of iCloud and back in, which should have ensured the local cache being purged, the problem continued to persist.
Before resetting Network Settings, I double checked my Cellular settings and spotted the problem that prevented Siri from communicating with Apple:
I recently added a second voice/text only line to my mobile plan (Verizon). In the Cellular settings > Cellular Data , I failed to toggle OFF the “Allow Cellular Data Switching” option, which is still an option even if the 2nd line added doesn’t allow for mobile data. Toggled this off; set mobile data to the correct SIM; et voila! Siri AI worked instantly.
Now just need to reload all of my iCloud data… grrrr!
For anyone with 2+ lines on your iPhone and difficulty with Siri AI, hope this helps as I couldn’t find anywhere this specific fix.
