User information can be obtained through the mobile phone card, which can be used to unlock the Apple ID. According to the query of Pacific Computer Network, the original card sticker is a device that can be used to unlock the iCloud account (that is, unlock id) of Apple devices. ICloud account locking is a security measure designed by Apple to protect users' data security, which plays a protective role in the case of lost or stolen equipment. The original card can bypass this lock by some technical means, thus canceling the iCloud account.