responsible for the activation lock—without needing a full jailbreak or permanent firmware alteration. In 2021, this was particularly significant as it provided a path for bypassing locks on iOS 15, which at the time lacked standard jailbreak support. Understanding ECID Registration Exclusive Chip ID (ECID)
Connect the device in DFU mode and run:
irecovery -q | grep ECID
Target Keyword: frpfile ramdisk ecid registration 2021