Did anyone find a solution or workaround to this yet?
Here‘s my story:
iOS 15.0 as well as 15.0.1 seem to break my personal hotspot for other Apple-devices. Strangely, first it worked without a problem with iOS 15 and an iPad (running iPadOS 15.0) until I noticed it didn’t work with my MacBook. To be precise, the personal hotspot as a router seemed to work… the MacBook connected to the personal hotspot and got a IP-Adress, but just didn’t send any packages out to the web or vice versa - in other words: no internet. So I did some troubleshooting: changed the iPhones name, deleted any saved information on the MacBook, reseted the network settings on the iPhone… but the problem stayed. At some point i got curious about my mobile provider and thought, maybe they changed some carrier settings or blocked the personal hotspot function for my number. But that wasn’t the case either: checked for carrier updates and tested the hotspot-function with other SIM-cards in my XR (also my SIM in other iPhones) and all SIMs worked as a hotspot, aslong as they weren’t in my XR. After that I saw the Update for iOS 15.0.1 - couldn’t find any changelogs about the described issue, but gave it a chance anyway… After the update to 15.0.1, not even my iPad could connect anymore - with exactly the same behavior. I doublechecked every VPN, private relay, DNS or Proxy… but no chance after all.
So I opened a discussion on the Apple Community - and got the tip to get in contact with my carrier…:
So, just finished testing after an other call with my carrier. They reset the SIM and, me on my side, reset the network settings, restarted the phone, changed the iPhones name, changed the password for the personal hotspot, logged out of the iCloud account… still: any device can connect to the personal hotspot over my iPhone and gets an IP-Adress, but none can access the internet over it. Tried the SIM in a 4G mobile router, and it worked. From my point of view, carrier and SIM is fine - there is no way the problem isn‘t correlated with my iPhone XR / iOS 15. The problem just started with the update to iOS 15. Or am I missing something?