How do I activate my iphone if I do not know my Apple ID?
Iphone 4s
Iphone 4s
You can try recovering your Apple ID here:
You don't. You will have to remember the Apple ID or get help from Apple to reset it. Otherwise the phone is useless. See: Apple ID: How to find your Apple ID
If you have genuinely forgotten your Apple id and owned the iPhone from new
see here
Apple ID: How to find your Apple ID
However if you have just purchased the iPhone which was used and is locked to the original owner's Apple id then they and only they can unlock it to allow reactivation and use by you
How do I activate my iphone if I do not know my Apple ID?