How do I get a new password for my iPhone 6s?

How do I get a new password for my iPhone 6s?

If you know the old one you can just go in to the Settings app and set a new one.

If you don't, and are locked out, your only recourse is to hope your backup is fresh, erase the phone with iTunes and start over. Have your Apple ID password handy, because erasing the phone doesn't clear the activation lock.

You assign it.

Try looking it up on Google