Making Sense of Cellular Usage Data

Discussion in 'iPhone' started by jmine83, Aug 29, 2013.

  1. jmine83 macrumors member

    Jul 9, 2011
    I thought I knew how the tracking of cellular usage data was recorded by the iPhone, but apparently I am mistaken.

    Last Saturday I took a road trip and on the side, I decided to see how much cellular data would be used while I had my iPhone in map navigation mode with Siri giving directions. It was approximately 3 hours of driving roundtrip. From my home location, I recorded the "Sent" and "Received" values in the "Cellular Usage" section of my iPhone settings at the very beginning of my road trip; then again when I returned to the exact same home location.

    I expected that either or both of the Sent and Received values would have increased noticeably when I returned home from my road trip. My impression being that the cellular usage data is simply a cumulative total of cellular bandwidth used since the last reset of the data (my last reset being July 31).

    However, the results I ended up with are as follows:

    Sent (initial,final) = 31.2 MB, 29.7 MB
    Received (initial,final) = 352 MB, 341 MB

    As you see, for some reason the values "decreased" and not evening by very much. I am mostly very confused, however, by why the values decreased.

    I also just took a look at what the values are on my phone right now, which are as follows:

    Sent = 33.0 MB
    Received = 352 MB

    Suffice it to say, I'm at a loss in understanding the cellular usage data reported on the iPhone. I did this experiment to start with so I could precisely track and measure the amount of cellular data usage for specific Internet usage functions; e.g. map navigation, emails, texting, etc.

    Feedback and insight on this is much appreciated.
  2. Mrbobb macrumors 601

    Aug 27, 2012
    Have we been playing with time machines, or be near a quantum discriminator apparatus lately? :D Most perplexing.

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