Over the last couple of years, through several versions of iOS, I have had very mixed results with this wipe out function. I have been reporting this to Apple via the Feedback page and also directly via Tech Support cases which were escalated more than once. I would use it if I needed to sell and hand down a device to someone. What I am finding is that Erase All Content and Settings 1) turn off Find My ... automatically 2) wipes the device contents and back to factory settings 3) removes it from https://www.icloud.com but 4) fails to remove it from https://appleid.apple.com After my initial reports, Apple added the option to remove the device manually from either page. This option is of course useful for other scenarios other than mine and it is a welcome addition. But it should work automatically when using the Erase All Content and Settings function. I have tried many many variations and sequence permutations of the following. a) sign out of iTunes Store manually b) sign out of Messages c) sign out of FaceTime d) sign out of Apple ID e) Erase All Content and Settings Does anyone know what might be causing https://appleid.apple.com to show the device as still signed in and to refuse to delete it automatically? Besides iTunes, Messages, FaceTime and Apple ID what else uses the Apple ID on a MacOS or iOS device? Perhaps nothing. I think something is broken in the way things happen in the background when the device link to https://www.icloud.com and https://appleid.apple.com is being severed by this process.