When the iPhone crashes or locks up in a way that prevents the iPhone from responding to the normal iPhone restart procedure, you need to reset the iPhone. Resetting the iPhone is simple.

Reset the iPhone by holding the sleep/wake button at the top right of the device and the home button at the bottom center of the face at the same time. Hold them both until you see the screen go black and the white Apple logo appear. When this happens, you can let go – the iPhone is rebooting.

Resetting the iPhone should not remove or delete any data or settings.

http://ipod.about.com/od/iphonetroubleshooting/qt/reset_iphone.htm

I would like to let everyone know my saga of getting the iPhone to work with my company’s exchange server.  It is not pretty.

Step 1.  Configure iPhone to imap settings

Step 2. Cry as I receive an error message saying that I do not have a replica of my mailbox on this server.

Step 3. Inquire with exchange admin 1.  He says ask Exchange Admin 2.

Step 4. Verify with Exchange Admin 2 that my mailbox needs to be migrated to a specific server (stupid iPhone and their inability to support activesync.  I cannot wait for version 2 to come out….)

Step 5. Migrate my mailbox. 

Step 6. Receive an error.  The system attendant is located at an infostore that is corrupt.  Wait for Exchange admin 2 to fix the problem.

Step 7. Migrate my mailbox.

Step 8. Notice that the migration did not take.  I did not allow for continue after corrupt messages, and I have a corrupt message.  HARAAH!

Step 9. Accidentally purging my mailbox.  I had two copies and I removed the new copy.  This apparently causes much hell on the side of exchange.  I lost access to my mail and feverishly backed up my OST storage information to a PST.

Step 10.  Create a new mailbox for myself.

Step 11.  Close outlook.

Step 12.  Open outlook. 

Step 13. Migrate the mail back to outlook.

Step 14.  Verify the iPhone works correctly.  I AM RECEIVING MAIL!  YEAY!

Step 15. Cry repeatedly as the amount of mail has locked up the iPhone.

Step 16. Pending.  Assume that more crying will be in order…