Trying to deactivate old iphone 6+. It is signed in with old AppleID which does not exist. Don't know password.
I'm trying to deactivate old IPhone 6+ to sell. It is signed in with an old AppleID which does not exist. I deleted that email years ago. I don't know the old password. I have not been using this IPhone for years. Since that IPhone, I have used 7+ and am now using XS Max. My new AppleID is functioning well. I'm not sure if it is the same account with switched Apple ID through the years or not.