I wanted to turn on my old IPhone, but a couple of months ago I changed the id which I used for this IPhone so I can't turn it on now (when I choose "forgot password" it says that this apple id doesn't exist (of course, cuz I changed it!) but there is nothing about using another id. What can I do?
iPhone 5
Under these conditions, you won't be able to answer your security questions successfully. Thus, see
Security and your Apple ID https://support.apple.com/en-us/HT201303
This document says “without proof of your identity via security questions and other carefully selected criteria, Apple Support can't help you reset a password or perform any other actions on your account.”
Thus, unless there are extenuating circumstances, we can do nothing for you. But, if you want to contact Apple support to discuss your problem, see these support options:
Get a call from Apple support to help solve your problem using this link https://getsupport.apple.com/?caller=kbase&PGF=PGF63005&category_id=SC0245&symptom_id=23362
Apple ID Support https://support.apple.com/apple-id
Apple ID account security for country-specific and region-specific help https://support.apple.com/en-us/HT204169
Get Support: We’re here to help https://getsupport.apple.com/. Go through the options to find the best support option.
If you have changed your ID or password, have you followed the steps in this article?
What to do after you change your Apple ID or password - Apple Support.
How to turn on IPhone if I changed apple id?
