sold iphone
Hello I sold my old iPhone 6plus to Mazuma and now someone has bought the phone from eBay, I need to clear the phone but not sure how and make sure they can't see any of my details. It's complicated because it was logged into my partner's apple account and he has unlinked the account but the person who has bought the phone is still saying they can't use the phone without his apple password which we aren't willing to give.
iPhone 6 Plus, iOS 10