In the past, there have been issues with jailbreaking and a loss of push notifications. I don't have an iPhone 4, so I don't know if that issue still exists...but apparently it does. I know there was a fix for older iPhones, but I'm not sure if it works for the iPhone 4. You could always research it and try the fix. If you run into issues, just put your phone into DFU mode and restore it...then re-jailbreak it, etc. But this is a jailbreak issue, not an iCam issue. If you need some help, let me know...and include your iOS version and modem firmware (Settings > General > About). Also include the name of the jailbreak program you used.