Currently Being ModeratedJun 9, 2013 6:15 AM (in response to dalso)
I Have this same provlem too! I live in Canada i have an iPhone 5 and my current carrier is Rogers. It is the app checking notifications! Do you have lots of apps ( i have 429!)? Now when i am in the house or our my cellular data ( settings> general> celular> cellular data off) is turned off! I have a 300 mb plan and now when ever i use data (safari, weather,siri ect...) i go into setting and turn it on, then when i am finished i turn it off! It helps when i am at home and when i am out!
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Currently Being ModeratedJun 9, 2013 8:16 AM (in response to dalso)
Other than America/Canada's annoying price gouging for 3G data... there really isn't much of a solution because Apple's ingenious plan was that iPhones should normally use 1GB of data every month and not tell the user where it all went to.
Also, At&t was under investigation by some government organization for that night-time data transfer you've seen. I don't know if there ever was a resolution from that or not.
You can turn off the 3G data like Matthew349 said, I personally do that all the time when roaming in European countries where my main provider would normally charge 15€ per MB.
But talk to At&t about the extreme night data transfers that happen when you're sleeping. They should help you identify what's going on. If they don't think it's possible, they're lying ask for a detailed report of the sessions of the huge data transfers and where that communication happened.
Currently Being ModeratedJun 9, 2013 8:22 AM (in response to chattphotos)
The original post was from October 2011. If the OP hasn't resolved the issue by now, they've probably either changed plans, changed phones, or changed carriers.
Currently Being ModeratedJun 9, 2013 8:24 AM (in response to chattphotos)
The nighttime data transfers do not happen at night. The large data transfer reported in the middle of the night (around midnight PST, 3 AM EST) is the billing system recording data used during the previous day. It is an accumulation of all data that transferred from the switch location the phone was last connected to. Similarly, the data usage during the day is the accumulated data from each switch location that you traverse in your movements that is reported to the billing system when you lose the connection to that switch location.