Hello, please help

I have such a strange situation ... My sister's friend gave the phone to my sister, but she (the friend) herself does not remember either the password or the email from the Apple ID account, today we reset the settings and saw a window where you need to enter the password and unlock it mail from the account. Password and mail, As I said, we don’t know. Therefore, we ask you to somehow unlock this phone. All documents are present.MEID - ****.SN - ****.IMEI - **** 1.ICCID - NOTHING

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