This topic might be not new, but after trying everything possible I need your help. Maybe there's a solution I did not consider yet. I had a chat with Apple, which at the end was not really helpful: I received an e-mail, which main message sounds like "I can't help you." Apple suggested I should go for a new Apple-ID, because HomeKit doesn't work with Apple-IDs which are connected to a developer account. First, that's not true. HomeKit worked fine before and I have some friends who are developer and they have no issues. Second, a new Apple-ID? Seriously? I had mine for years and don't want to sync thousands of photos or any other data on nine different devices. Not to mention all the other places like "Support Profile" which needs to be updated than as well. That's like "You're iPad is not working? Get a new one. I don't care." But let's talk about the problem. After restoring my iPhone from an iCloud backup—had some issues with battery life and Apples support failed in this case as well—I am not able to reinstall any HomeKit devices. As for now, I can control Philips Hue with the official app, but all other devices like Elgatos Eve are useless, and so is Siri. Everytime I tried to configure Siri with Philips Hue or add a device to Elgatos Eve it says: "iCloud sync in progress. Try later." For weeks now. And HomeKit is not visible in Settings like it was before. Things I have tried so far: * turn off and on keychain sync * reset network settings * reset all HomeKit devices and finally (in that order) * I deleted all HomeKit apps * I turned off keychain sync * I signed off from the iCloud account on my phone * I deleted HomeKit configuration on iPhone * I restarted iPhone * I signed in to my iCloud account again * I activated keychain sync * I installed all the HomeKit apps I have although restored my iPhone different times from iCloud and another time from iTunes. Data only—and the whole iOS (DFU mode) as well. Still "iCloud sync in progress." Any hints, tips or suggestions are welcome. I think this is something iCloud related, a kind of hickup I can't get rid of. But I assume there's no way to deleted all the data on an iCloud account to start over, isn't? Thanks!