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Why is iCloud Calendar data usage so high on my iPhone but not my iPad?

1800 Views 6 Replies Latest reply: Nov 2, 2011 9:54 AM by Rob Ehle RSS
chcn Level 1 Level 1 (45 points)
Currently Being Moderated
Oct 21, 2011 11:24 PM

I have experienced a huge increase in data usage since moving our calendars to iCloud. It's weird though: On my wife's iPhone 3GS and my iPhone 4 (both with iOS 5), something like 5-7MB of data gets consumed every time there is a calendar update pushed out. This easily adds up to more than 30MB of 3G usage per day without doing much else. However, we have all the same calendars synced to our iPad 2 also, and the iPad only consumes a few hundred KB for the same updates.


Before I go to the considerable trouble of doing a restore without using the old backup (suggested here), is anyone out there aware of a fix for this problem? Why are our phones affected but not the iPad? All three were upgraded to iOS 5 and iCloud Calendar about the same time and subscribe to the same calendars.

iPhone 4, iOS 5
  • Carolyn Samit Level 10 Level 10 (84,015 points)

    Try turning off Cellular Data, use Wi-Fi only


    Tap Settings > General > Network > Cellular Data


    Good article here > or-wireless-data-service/

  • rmcalhany Calculating status...

    Unfortunately, that can't be the solution for me.  I have my calendars set to "1 month back" already.  Any other ideas? 


    Oh, and I see massive data while I'm asleep at night.  Obviously there can't be 25mb worth of calendar updates while I'm sleeping...

  • rmcalhany Level 1 Level 1 (0 points)

    Deleted my iCloud account and my usage went down from 25+Mb/day to <5Mb/day.


    I'll reinstall to see if I just had a bad install, or whether iCloud is really faulty.


    If it is, then I'll do without until they come up with an update.

  • Rob Ehle Level 1 Level 1 (0 points)

    We've also noticed a recent problem with my son's data usage, also early in the morning when he's definitely not up yet. Not positive it's linked to his upgrade to iOS 5 and the iCloud. But if anyone else has experienced a surge in data usage since the iOS upgrade, I'd be interested to hear about it.


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