I know a few dozen people that are hesitant about making the jump from 3.1.3. This poll may help a lot of iphone owners 
I upgraded and like it. No issues and don't notice a slowness. Granted I did a complete erase and manual reload (because I forgot my backup password), so maybe that made everything nice and squeaky clean.
This is what I was thinking of doing...but people all over this forum (and other forums) say that a complete wipe/restore -> upgrade to iOS4.0 still leaves their 3G painfully slow and buggy![]()
I have spent by now 2 full nights without much sleep and an evening stolen from my wife and children just to be able to recover all application data and settings lost by the upgrade. I was able to recover most, but not all by downgrading. For me this upgrade is a big shadow on Apple. I would only urge anybody not even trying to upgrade to iOS4 on 3G. It sucks. Unless, of course, you like challanging your internal peace by lost settings and application data. iOS 4 upgrade is very similar to Windows Vista: it sucks big time.
I've had mixed results with iOS 4 on my iPhone 3G. When it's recently been rebooted, everything is noticably faster than 3.1.3. After it's been running for a while, it's worse than I've ever seen it. I think they may handle memory differently in the new version of the OS and it might not be working as well with the limited RAM of the 3g.
This is what I was thinking of doing...but people all over this forum (and other forums) say that a complete wipe/restore -> upgrade to iOS4.0 still leaves their 3G painfully slow and buggy![]()
I upgraded my 3G to iOS4 and I think it's fantastic. My phone runs extremely smooth, folders are great. I understand how multitasking would suck on the 3G but a background? come on. Just going to wait until jailbreak for iOS4 comes out
Its been out now for almost a month dude, wake up and smell whats cooking
That sucks, so they're not coming out with a jailbreak for OS 4??
I have 4.0.1 running on my 3G without any complaints. When I first upgraded, it was slow and laggy, so I restored it as a new phone and it runs great.