4.2.1 - Apps & Folders slow/delay to reorganize pages - What's Up !?!?

I also have the same problem with my iPhone4(32GB) newly updated to 4.2.1.
In Korean iPhone forum, it's devided into 2 groups w/ and w/o that problem.

How many apps installed is not the quite reason because there is someone who have no problem with his iPhone that has more thatn 450 apps installed.

I guess some apps makes this troble...

I'm having the same problem on my iPod touch 32gb 3rd gen.
i have about 160 apps (in folders) and 120 songs on my iPod.
Is this caused by an bug or any app and can I fix it myself
ps. Its not jailbroken

thanks in advance

I also have this issue with my 32 GB iPhone 4. I currently have ~250 apps, but haven't had any delay when reorganizing with 4.0-4.1. Now I get the same behavior you are describing. I have also noticed the keyboard is slow to respond in Messages and the Camera app takes forever all the sudden. I also did a restore -- haven't done a restore as a new phone yet -- and the issue persists. My father-in-law just updated his iPhone 4 (32 GB) to 4.2.1 with absolutely no issues whatsoever. Not sure what kind of issue we have here. If it weren't Black Friday tomorrow, I'd go into an Apple Store for sure. :/

I have a iphone4 32gb with tons of apps on it, and this is happening to me too. Exactly the same issue. quite a delay, since 4.2.1 update.

Same problem here. Using 32 GB iPhone 4 with about 100 apps.

I have the same problem with the delay of moving apps around. It's ridiculous apple. Why don't you fix all the problems before releasing updates. I hope there is a fix to this, I have a iPhone 4 32gigs with 100 apps and 130 songs if that helps.

Yes, same here exactly the same problem. I have 206 apps installed on a stock 32GB iPhone 4.
Find 5 seconds to jiggle and up to eight seconds to return after Home button push.

Rebooting phone returns jiggle response times back to normal.

Have reported this to Apple

If you mean rebooting by hold down the home button and sleep button it's didn't work at all. It's the same.

I believe I know a reason behind this. If you look at the app folders when you attempt to rearrange the home screen, you'll notice that the app folders act differently than previously.

When you hold down on an icon, the current folders on the screen scroll upwards to reveal the apps in the folder that cannot be seen when the apps are not being arranged. This is very minor, but did not happen in previous iOS software, so I can see this as a possible cause for the delay. This shouldn't really be an excuse as the iPhone 4 is so powerful and should easily handle something like this. However, it does put a slight toll on memory.

This is the only reason I can find. I haven't tried not having any folders, and use an iPhone 4 32GB with about 8GB unused.

Not having this issue on either my iPhone or ipad.

Same problems here. I've tried rebooting, wiping it and restoring a backup, and only having a few apps in the folder. It's still pretty slow. I used to be able to brag about how fast and smooth everything on the iPhone was. Now it takes about 5 seconds to open a folder.

Same here with the folders. It's really irritating trying to take a picture when it takes so long to go to home screen and open another app

This was driving me nuts. I was able to eliminate the slow entering-and-exiting-rearrange-mode problem by moving all of my apps out of folders, then back into folders but not putting more than 8 apps in any one folder. (It took about 15 minutes; it probably would have been faster if I'd used iTunes rather than the touchscreen interface.)

I came to this conclusion:

*If there are 9 or more apps in any folder, then it's slow. But if there are 8 or fewer in every folder, then it's fine. If you have multiple folders with 9 or more apps in them, it gets slower and slower.*

Joey Shambrook seems to be onto the right idea--when there are 9 or more apps in a folder, iOS 4.2.1 scrolls the little thumbnails in the folder icons in order to show some blank space--and then scrolls them back when done rearranging--whereas 4.1 did not. Why this would be so slow I have no idea.

However, this does not solve the separate issue of folders being slow to open. My iPhone 4 is still quite slow under 4.2.1 when simply opening a folder (whether or not it's in rearrange mode). It takes 2 to 3 seconds to open a folder for me, even after doing all this rearranging. Even when I'd moved every app out of folders, and then created a single folder with just 2 apps in it, there was the 2 to 3 second delay to open it. My iPad with 4.2.1, which has just a half-dozen apps on it, opens folders instantly.

I have about 90 apps installed on my 32GB iPhone 4.

I too have this same problem on my 32GB iPhone 4 with 4.2.1. The behavior did not show up previously. The phone will work normally until I move or delete an app. Then there is a delay in going into and coming out of move/delete mode, and folders take up to 5 seconds to open in normal mode or edit mode.

Dear All,

I have raised an official bug report with Apple Engineering and going through it with them. If you wish to do this too you can by creating a free developer account here: http://developer.apple.com/programs/register/

Best wishes