prepaid data booster was used when Cellular Data was off!

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I have an iPhone on the prepaid $15 base plan, with a data booster and a talk booster added. I have made a few calls (which are shown under Booster Usage when I log into self-serve) and sent and received some texts (which are free in my base plan), but I turned Cellular Data off as soon as I bought the phone two days ago, and have never turned it on. I've been using my home wi-fi network. And yet, sometime between last night and this morning, 0.01 MB of data was used. Yesterday evening, usage of my data booster showed zero when I logged into self-serve, and this morning it was 0.01 MB. How is that possible?

Having seen the data usage when I checked my profile this morning, I double-checked that Cellular Data was still off on the phone, and as part of doing so I turned it on and then off again. It was on for only one or two seconds, and the phone was connected to my home wi-fi network at the time. Then I logged into self-serve and checked my data booster usage again, and now it's showing that I have used 0.02 MB!

How can data be used when Cellular Data is off? And what could have happened in the two seconds that it was on to use another 0.01 MB? This isn't a lot of data use, but I want to know why it's happening and how to stop it.
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Shoshanna

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Posted 5 years ago

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Paul Deschamps, Mobile Master

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As you said it's a very very tiny amount of data that was used and when you turn it on it will make a split second connection to the data link to tell the phone it's connected and complete the connection. I don't think there is any way to avoid this as it's how all smartphone and data connections work, even when connected to wifi. It needs to read back and forth for each to complete the initial connection.
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Sophia, Mobile Master

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With the $30 booster, 0.01 MB would cost exactly $0.0003 so I don't think you have to worry too much about this :)
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Dennis, Mobile Master

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I get that it's the principle that counts. And if it is 0.01mb per day that will add up over a long time period.
I dont think there is much more insight that can be provided on this community as I think it is a network (technical) question.
If you you like to explore this issue further, I think calling Koodo would be your best bet
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Shoshanna

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It's certainly tiny, but it's supposed to be impossible -- that's why I'm curious! And slightly concerned: it only transferred 0.01 MB behind my back this time -- twice -- but without knowing why and how it did so, I have no assurance that it won't transfer more another time. Considering the history of some users (on various providers; nothing to do with Koodo) seeing huge cellular data spikes on iPhones that were supposedly using wifi, which got a lot of coverage a year ago or so, I want to keep a close eye and find out whatever I can about this, even aside from curiosity about the technical point.
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Dennis, Mobile Master

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On my iphone4 a few months back I purposely had the wrong data APN set on my phone to prevent data use but still charged 0.01mb when it was imporssible to even use data to connect on my phone unless I edited the APN settings.

I eventually called Koodo and they were able to reverse the charges and the error never happened again.

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