Iphone4
I forgot my apple id of this device what can i do now
iPhone 4
Question marked as
If you are locked out of your Apple ID account you can go to https://iforgot.apple.com
This will provide you with the recovery steps you put in place for this situation.
Here are some support articles that should help:
If you forgot your Apple ID password - Apple Support
If you forgot the answers to your Apple ID security questions - Apple Support
If your Apple ID has been locked or disabled – Apple Support