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3G iOS4 resulting in sluggish performance and horribly slow calendar

I "upgraded" my iPhone 3G using the restore method which in itself was trouble free.

However, the whole UI is now sluggish and even worse, the Calendar app is PAINFULLY stilted. My MobileMe calendars are visible, but the screen freezes, after a pause (5-10 seconds); the calendars disappear! Then after another pause (10 seconds or so), they reappear!

Generally, the whole phone feels laggy with button presses seemingly not responding and then the OS playing catchup.

Anyone else had Calendar slow-down/pauses happen?

Greg

iPhone 3G, iOS 4, MobileMe contacts, calendars and email synced over the air

Posted on Jun 22, 2010 4:43 AM

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81 replies

Jun 22, 2010 5:40 AM in response to Greg Siddons

Not sure if this is related but when I first updated my 3G with iOS4 it seemed quite snappy but it's now running a little sluggish. When I went into Mail I noticed the little activity wheel in the top bar has been spinning for the last hour.

I'm wondering if the new Mail is performing some sort of re-index of emails which is hogging resources?

Jun 22, 2010 8:43 AM in response to Gregory McBride

I am having the same issue. Subscribed calendars seem to be the major issue. I have 5 or 6 subscribed calendars that when I uncheck in the Calendar settings on the iphone to not show, the calendar app is much more responsive. Now when I open the Calendar the events show then reappear in a second or two but the app does not lock up as it did with subscribed calendars showing.

3G iOS4 resulting in sluggish performance and horribly slow calendar

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