Buying locked iPhone.

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.

You simply don't. You most likely put money in a thief's pocket and there is NOTHING you can do to use the phone. Apple won't help you. We can't help you. Recycle the phone and chalk this up to a bad buying decision.

Read this link --> The All Too Common SAD Reality of Buying … - Apple Community

You bought a stolen phone. It's not Apple's problem.

You will never be able to use it. Recycle it or return it for a refund if possible.

what do we do to get unlocked?

littleman140 wrote:

what do we do to get unlocked?

Nothing. You can't get it unlocked.

It's useless.

Softer words won't alter reality.