We have family plan daughter gave me her iphone when she got 5s son has iphone 4 I only use mine for calls as I have ipad and iMac. I am trying to figure out useage that shows on bill as I do not want to pay for other families useage.
Welcome to the forum, Dot. I'm trying to understand your question... are the three of you dividing up the bill according to who uses how much data through out the month?
If each device is using a separate sim card then it would be possible for your telco to provide (either online or paper) a bill that itemises each service.