3G iOS4 resulting in sluggish performance and horribly slow calendar

After finally getting the upgrade to finish (failed; then froze; then took forever) my iPhone 3G seemed much faster.

However, this morning I noticed that certain actions are VERY slow. e.g. opening address book and clicking on ANY entry causes a delay of about 7 seconds before the entry is displayed. The blue 'highlight' bar appears on the entry name and the phone is frozen until, around 7 seconds later, the contact info finally appears.

This is 100% repeatable. Even if I click an entry, then click the All Contacts button to go back and then click the SAME entry, it still takes another 7 seconds to reload the info it just had in memory. (Going back to the All Contacts list happens instantly every time, which raises the question: why can the phone load the list of all contacts instantly but not the info for any one entry?) Bizarre.

Calendar app works fine for me though.

I've had calendar slowness problems related to subscribed calendars all along, with older OS versions; it seems like it feels the need to reload all the subscribed calendars every time you start up the calendar app, and it ties up all the resources of the phone so you can't scroll or anything until it's finished. However, the blanking out of the screen during this reload is a new iOS4 issue. I'm hoping the new iPhone 4 will not be this sluggish due to its faster processor, more memory, etc.

Hi there -- how are you reverting to 3.2? I would love to, as I am unhappy with IOS4, as well -- but everyone at apple I've spoken to says there is no way to revert back....

Help?

Well if misery loves company, I'm glad to see that I'm not the only one experiencing this problem. Since updating to ios 4, the Calendar function is almost unusable.

THere is a significant delay when the app opens before calendar items load. Pressing anywhere will then experience another significant delay.

I too am seeing the internet activity indicate spinning for long periods with the calendar open and usually while this is happening I am unable to do anything, short of exiting the calendar app.

same thing here folks... I've got a 3G and it's super slow after the 4.0 update. Plus I've lost my contact names... only showing telephone numbers.

same problem here. the calendar delays about 10 seconds before opening up

As described - goes blank, pauses, refreshes. But having deselected the subscribed calendars, it has speeded up the 'refresh' bit.

shoegal321 wrote:
Hi there -- how are you reverting to 3.2? I would love to, as I am unhappy with IOS4, as well -- but everyone at apple I've spoken to says there is no way to revert back....

Help?

Here you go: http://www.maclife.com/article/howtos/downgradeiphone_os_40_beta_back_iphone_os313

Trevor Smith1 wrote:
After finally getting the upgrade to finish (failed; then froze; then took forever) my iPhone 3G seemed much faster.

However, this morning I noticed that certain actions are VERY slow. e.g. opening address book and clicking on ANY entry causes a delay of about 7 seconds before the entry is displayed. The blue 'highlight' bar appears on the entry name and the phone is frozen until, around 7 seconds later, the contact info finally appears.

This is 100% repeatable. Even if I click an entry, then click the All Contacts button to go back and then click the SAME entry, it still takes another 7 seconds to reload the info it just had in memory. (Going back to the All Contacts list happens instantly every time, which raises the question: why can the phone load the list of all contacts instantly but not the info for any one entry?) Bizarre.

Calendar app works fine for me though.

Things that were slow for me: settings app is slow, with the scrolling being extremely slow; texting was beyond sluggish and the lock-screen wallpaper would take more time to show up, compared to the previous update,

Things that were fast for me: like you said, contacts would load so fast, but each contact's info would be slow when loading, switching between apps is extremely fast

Hi Greg,
et al.,

I synchronize my Gmail account on my iPod Touch using Wi-Fi. To do so, I use the Exchange settings on the iPod.

I experience the same problem as you do since I have upgraded it to iOS 4: Frozen calendar, items disappearing, getting back @5 seconds after, etc. I must say that the Mail app is also doing strange things, but this is another story. (and I could go on and on about my general disappointment with iOS4)

On another topic, which seems to be a problem to many users, I got several time error 1602 when trying to upgrade. I simply installed iTunes on another “clean” computer, performed the upgrade, and then synched back on my computer. Also, before starting the upgrade, I had disabled synchronization for Music, Podcasts, Video, etc, which saved a lot of time during the process (I had lost already enough time with 3 times error 1602!)

Kind regards,

Xavier.

When I view my calendar (List view), yesterday shows up at the top of the screen before it refreshes then updates to today. Hard reset did not improve performance. Overall, I'm experiencing the same sluggishness mentioned elsewhere here.

Message was edited by: Dino Ilarde

rottonApple wrote:
Yeah I am having the same problems...

Runs slow, ... very sluggish, and I get the exact same freezing problems when using the calendar.

Ditto.. I'm having the same problem have tried all the suggestions. I'm going back to 3.1.3 tonight and giving it to my wife since my i4 is sitting at my house..

I too have the same problem with sluggish calendar behavior. Screen taps don't register system hiccups, scrolling does not work. System has to "catch up" spinning gear. I have a 3GS though.

Well apparently I'm not alone in being underwhelmed by IOS4 on the 3G. I understood that some features would not work, but I am seriously disappointed that Apple did not disclose that the level of performance degradation would be so obscene. I am hoping for a fix, otherwise I will follow the MacLife guidelines to revert to 3.2 which while not fast was at least usable.

My calendar issue relates to invitations received through the Exchange connector. I have limited calendars and eventually they all display with eventually being a gross compliment. However if I select the Inbox to go to the invitations screen while they display reasonably quickly if I select any of them to go to the detail screen and try to accept, decline or maybe the appointment, I get the gear wheel and then the Calendar app crashes.

I much prefer my iPhone to the corporate issue Blackberry but I must say that if IOS4 works great on the iPhone 4, well swell, but it's performance on the 3G even ignoring feature deprecation is execrable and needs to be addressed.

I read one pundit who said the performance is crappy by design to get iPhone 3G owners to upgrade. I do not think this of Apple but it sure looks like this.

I posted earlier in this thread with these issues and have found a solution. It is called iPhone 4. Got it today and all of the sluggish calendar performance has disappeared. I know that is not the answer a lot of you were hoping for.