Randomly, about every few days, all my data connections go dead when I unlock my iPhone 5S from sleep. Wifi, Cellular, doest matter. Nothing loads. Cycling airplane mode doesn't work to get data working, and the only way to get them back is to turn the phone off and on. This didn't used to happen pre iOS. I've tried both a network connection settings reset and a full reset of the phone via iTunes. Is this a common problem thats being worked on? Anyone else experience this? Should I bring it to an Apple store to swap for a new phone? Could it possibly be an app thats causing this?