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Why are push Notifications not being delivered in the background on a 4G LTE connection but they work fine on Wifi?

We believe there is an issue on iOS devices on 4G connections when the content-available flag is set to 1.  For more information, check out this stackoverflow post:

http://stackoverflow.com/questions/24928590/ios-uibackgroundmode-remote-notification-doesnt-work-on-4g

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