I just got my daughter an iPhone 5c. I have not used a smart phone at all. I am not completely old tech but would like information on turning off apps in the background. Little did I know that these apps still will use data even though she is not using any apps per say. What apps need to stay on for the phone to function. I found out thru Verizon that just the clock on her phone will use data which I do not understand as a normal phone has one that does not use data. Is there a clock that does not use data? These are the questions I would like answered. I have a small Data plan and she only needs to use wifi. thanks.