First, you need to have your own ID, and then you need to start the "Find My iPhone/ipad" function. Turn on location services in Settings-Privacy, and then turn on "Find My iPhone/ipad" at the bottom. Download the "Find My iPhone/ipad" app on another ios device, log in to the apple ID, and then query the location of the lost iPhone/iPad under this ID. (If you don't have a second-born ios device, you can open "www.icloud.comn" on the PC side (ie is recommended, other browsers may not support it), log in to the ID, and select "Find my iPhone/ipad". )。 Click "Play Sound", even if the phone is set to mute, the alarm of Didi Didi Didi ... will be played at the maximum sound. If you click "Lost Mode", you can enter the information that needs to be displayed on the device, including * * * good people calling. After the settings were lost, our iPhone/ipad remained in the state of "screen+information display", and all the upper and lower control centers were closed. Nothing can be done except calling this number. If necessary, you can also click "Erase Part of iPhone/ipad" to remotely erase all the contents on your phone. After erasing, the information just now will continue to be displayed. However, Find My iPhone/ipad needs to be connected to a wifi or cellular network to take effect. Before ios7, this was a very serious BUG, because you could use PC-side software to erase all its contents and settings when you were disconnected, and such settings were invalid. However, after ios7, "View My iPhone/ipad" added a new function, "Activation Lock", and you must enter a password to turn off "Find My iPhone/ipad", or reactivate the data on the device. Finally-no matter how you brush the computer, you can enter DFU mode, and it is useless to use Itunes and Itools. Finally, you have to enter the Apple id to activate it. Even if you steal to the ends of the earth, it is brick ~ ~ ~ ~ ~ ~! ! ! ! !