I'm developing a little Objective-c app, and everything works fine, but when I run it on my iPhone and I let the app on background for a long time (all day for example) all network services get a timeout error, but if I close the app and start it again, it starts to work fine, what could be the problem?
PD. I'm using NSURLConnection sendAsynchronousRequest:queue:compltionHandler: and NSURLConnection initWhitRequest:delegate: