How to remove the lock?

Question

iPhone

A long time ago, in the year 2014, I bought myself an iphone 4s. I used it, it was cool, but then I went to android, and put the phone somewhere on the shutters. I found it yesterday while going through the closet. I decided to give it away, having formatted the phone before that. I formatted it, connected wi-fi, and I see a menu with ACTIVATION BLOCK. As I understand it, this thing cannot be removed, but I have a different question. I registered this iphone with an old Apple ID, which was made on some forgotten mail from Yandex, which I naturally don’t remember. How can I at least find out this very mail? Is it covered in asterisks on the menu? Restore everything, I think I can.

Answer 1

Try this guide
https://www.youtube.com/watch?v=0JvQdyVFsRM

Answer 2

well, everything is never closed)
so remember

Answer 3

Just remember)

Answer 4

remember, there is no other option