Below is the location of the iPhone and iPod CrashReporter Log Files
Mac OS X
iPhone: ~/Library/Logs/CrashReporter/MobileDevice/
iPod touch: ~/Library/Logs/CrashReporter/MobileDevice/
(The tilde “~” represents your Home directory.)
Windows XP
iPhone: C:\Documents and Settings\[Username]\Application Data\Apple Computer\Logs\CrashReporter\MobileDevice
iPod touch: C:\Documents and Settings\[Username]\Application Data\Apple Computer\Logs\CrashReporter\MobileDevice
Windows Vista
iPhone: C:\Users\[username]\AppData\Roaming\Apple Computer\Logs\CrashReporter\MobileDevice\
iPod touch: C:\Users\[username]\AppData\Roaming\Apple Computer\Logs\CrashReporter\MobileDevice\
(If you don’t see the Application Data or AppData folders, you may need to show hidden files.)