It is possible to supervise your phone AND keep all your data. I've done it to my phone. https://www.techlockdown.com/guides/restore-full-backup-supervised-ipho

It is possible to supervise your phone AND keep all your data. I've done it to my phone. https://www.techlockdown.com/guides/restore-full-backup-supervised-iphone https://www.techlockdown.com/guides/restore-full-backup-supe... When you do it, be sure to Disable Stolen Device Protection and "Find my iPhone" on both devices.