iOS dep phone home screen stuck after restore

So, to be clear, you are basically trying to enable iOS's supervised mode on existing (unmanaged) iOS devices and don't want to reset them (or at least be able to restore data)?

To be honest, I've never used this approach but I've read a few articles about it. I guess I've always been lucky enough to convince people a reset is unavoidable.

From what I've read, the workaround involves first restoring the backup to a different device, like this:

• Backup the main device;
• Restore this backup to a temporary device;
• Backup the temporary device;
• Use this last backup to restore during Setup Assistant on the main device.

That, I've been told, is the workaround to get this working. I'm very keen to hear your experience in this.