What debug information is available on iOS
I think there are two possibilites to get log information.

First sync your device with your Laptop / PC via iTunes. Then go to:

OS X

~/Library/Logs/CrashReporter/MobileDevice/&lt;your iPhone’s name&gt;/


Windows XP

%APPDATA%\Apple\Logs\CrashReporter\&lt;your iPhone’s name&gt;\


Windows Vista+

%APPDATA%\Apple\Logs\CrashReporter\MobileDevice\&lt;your iPhone’s name&gt;\


Second use the iPhone Configuration Tool from Apple.