Phone has activation lock, can’t unlock it what do I do next?

Are you the original owner of this iPhone? If so, then use the following support article to remove the activation lock:

• How to remove Activation Lock - Apple Support

If you are not the original owner, then you need to contact them in order for them to remove their Apple ID from this phone. If you can get a hold of them, then provide them with this support article:

• What to do before you sell, give away, or trade in your iPhone, iPad, or iPod Touch - Apple Support

If you are the owner or the owner has shared all information with you then to open Activation Lock:- If it is Activation locked, read here --> Turn off Activation Lock - Apple Support Activation Lock for iPhone, iPad, and iPod touch - Apple Support

Learn how to remove a device from a previous owner's account.

If you are not the owner and do not have the Apple ID and Password then there is no way that you can get into this iPhone unless the original owner shares the Apple ID and password with you. If you are lucky you can get into this iPhone if they (owner) accidentally remove the device from their apple ID.