What path is the Mail app?

Sep 21, 2009
Whenever I open the Contacts app, my iPhone freezes for a few seconds before displaying the contacts.
I recall somewhere on this forum that the solution is because the Mail app opens (verified through SBSettings processes) and the solution is to disable the mail app (I don't use it anyway).

But I can't find that thread anymore. I don't know the path to the mail app so I can rename it. Can anyone help?