Short form: If you have an iphone 3g, do NOT get the new ios4 upgrade for your iphone. It’s MUCH slower and doesn’t add any features.
I’m building a list of iPhone ios4 stupidity. I wrote this all in a deadpan tone though I could have used a lot more exclamation marks and words like “stoopidly!” Here’s a start:
Most every app is much slower. For example, it now take 8 seconds to start the calendar, it used to take 4. Starting editing a note takes much longer. Etc…
It sometimes doesn’t detect my button pushes and sometimes mistakenly believes I have pushed a button. (yes, it’s insane)
I initially did an “upgrade” install. After it the Notes app would sometimes (twice out of 5 or so attempts) lose the changes I made to a note. I then did a “new” install and haven’t has that problem again.
Scrolling email is now much more jerky.
It appears that now voicemails aren’t downloaded to the phone until I try to listen to them. Which causes delays in listening to voicemails
In the first 5 seconds or so of running Notes, Calendar and many other apps, a snapshot of what was on the screen last time it was run is displayed. Of course, it looks editable, but it’s not. You can click all you want but you’re just looking at a picture of the Calendar app, Notes, etc. Key presses are not recorded or registered because… well, you’re looking at a picture of an app, not an app!
Update: 7-15-10: At the suggestion of the Apple rep, I installed iTunes on a new computer. I then Restored my phone to it, making sure to rename the phone when asked. This has fixed the problem. My phone is now as fast as it ever was. :-)
Update 7-25-10: My phone has gotten slow again after the full restore. I just installed 4.0.1. Starting Calendar still takes 8 seconds, up from 3. Eff you Steve Jobs :-)