I want to my iPhone to forget my apple Id ?
Reset your phone to factory settings will remove it, but will also reset all the other settings (maybe not what you want ??).
Another solution could be to just "Sign out" of the Store "Settings->Store" - BUT if you have bought apps, and they need to be updated, then you still need to enter your Apple ID.
Can you perhaps tell us why you want to forget your Apple ID ??
protected by Community♦ Mar 10 '12 at 14:18
Thank you for your interest in this question.
Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).
Would you like to answer one of these unanswered questions instead?