I need help for Activation Lock

Are you the original owner of the phone? If yes, see this --> How to remove Activation Lock - Apple Support

If you are not the original owner of the phone, you will need to get the original owners to remove the Activation Lock. If you don't know them or can't reach them, you cannot remove Activation Lock. Apple will not remove activation lock. We cannot help you remove activation lock.

If this is your situation, read this user tip I wrote about buying used iOS devices --> The All Too Common SAD Reality of Buying … - Apple Community