Apple id and password
We recently repaired my husband's iphone screen that was broken and switched off for almost 2 years now. The apple id that he used to log in that phone was his previous employee id and problem is now we are not able to sign in/delete the logged in ID as he is not working with that company from last 1 year and his email id in the company is discontinued. Please suggest how can i delete his email id from the phone and log in with his new apple id.
iPhone 6 Plus