How can I bypass activation lock

As deggie has already mentioned, you can't bypass it. If you are the owner of this iPhone, the following support article takes you through the steps to regain access to your phone. If you are not the owner, you would need to contact the owner to unlock it. If you don't know the owner, or you do and they won't help you, then this phone will be useless to you or anyone else.

Ref: How to remove Activation Lock - Apple Support

You can't.