I have a random crash in my iOS app. This happens when on slow internet connection. My office internet speed is too fast.
For testing on simulator, I installed Netwo
Can't you use a ipad/iphone connected to your mac to reproduce the crash ?
ios6 contains a network link conditioner, too: http://www.neglectedpotential.com/2012/09/ios6-network-link-conditioner/
What about a development proxy server to simulate slow connections? One that looks promising is http://www.charlesproxy.com/
You can set the network to slow characteristic by testing on devices. Go to Settings -> Developer Settings -> Network Link Conditioner -> Enable. This is for iPhone/iPad running iOS 6 Network Link Conditioner is also available for the Mac in "Additional Tools for Xcode" for testing in the Simulator.
Note: It appears after device has been connected to Xcode, enabled for development and some app run on it.
Here's how you can test HORRIBLE network performance: