Had an Iphone 4 for my daughter and did an upgrade to an iphone 5s. We now blow through our data in a week. We have turned everything using data on her phone off and its still using huge chunks of data. We took it to a verizon syore and they "fixed" it for us. It now uses double the data. Daughter is on a trip and can't text us now. Any fixes for this thing or do I contiue to spend $15 to $30 per month extra while limiting her phone data?