Is anyone sending your son messages while he is not connected to wifi? If they are receiving incoming iMessages, that could be a factor to the data usage.You could also check and see if the wifi cuts out and defaults on their data when they are using...
If I change my plan, will the plan offer ever expire? I was looking at the terms and conditions but I couldn't find any details about whether this offer would expire or if the plan would increase at a later time?
