If you update an IPhone and he asks the Apple ID and password, what are you doing?

I've just updated an Iphone 5s and it asks ID Apple and Apple ID password but the person doesn't know their information. What can I do?

This person buy second hand device? If so - this device obviously has activation lock.

You must contact the previous owner and ask him to remove this iPhone in the devices list. Otherwise, this iPhone will be a useless brick.

Find my iPhone Activation Lock: a mechanism of extraction of the previous owner - Apple Support

Tags: iPhone

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