جهازي متوقف مقيد بالمالك وانا لا اعرف

If you bought this iPhone used from the previous owner, then that person must unlock it for you. The link below outlines the steps they must take. If they will not or cannot, then ask for a refund. You will not be able to use that iPhone.

What to do before you sell, give away or trade in your Apple Watch, or buy one from someone else – Apple Support

For future reference, this article explains what to watch our fo if you are purchasing a used Apple device:

The All Too Common SAD Reality of Buying … - Apple Community