I'm having problems with data usage. In 3 days my son's phone has consumed half or our monthly shared data. The strange thing is, when I checked the usage log, it's showing that he used over 300mb of data at 6:00am while he was sleeping and his phone was connected to wifi. It also showed over 1Gb of data usage while he was at school...he was playing football and not using his phone. Any suggestions on what might be happening?