Q: Iphone 3G slow after update to IOS4

easily fixed, though - several of us have now found :

http://discussions.apple.com/thread.jspa?threadID=2475859&start=658

I am in the process of rebuilding my iphone after surfing to find a 3.1.3 downgrade download. Apart from all of the problems experienced by others, it also stopped working properly with my iPhone cradle in the car i.e. names not coming up on screen so I cannot put the phone in the cradle which makes it unusable when driving apart from answering a call. My wife has a 3GS and is fortunately easy to please.
HUGE OWN GOAL by Apple - even worse that I cannot restore my files without version 4 of software - this was an unnecessary restriction - control freaks. The highs on a 3G are not worth anything like the lows, so Apple should not have recommended an upgrade. It will take more than a podcast of Steve Jobs talking to a sycophantic audience to convince intelligent users that Apple have not lost the plot and pushed their luck too far.

Also like others this has broken my loyalty - I use Apple because my WIndows PC become silly slow, and other phones went clunky. As the song goes '...the problem with success is you become what you detest' - that's what's happening to Apple.

iOS 4 doesn't work good in mail, safari, settings...slow, slow, slow.

For me:

Double hard reset only resulted in slightly improved performance for about a day before another double hard reset was required.

Turning off Spotlight searches resulted in some sustained performance improvement.

But, neither "fix" brought my 3G anywhere near to the snappyness of OS 3.1.2. Once I downgraded the difference was obvious.

Done that ages ago, when I first started to notice a performance drop. Turned off everything I could. if I turn anything else off then I wont even have a phone.

I want to downgrade but its not an official downgrade and I dont know if all the apps will work without ios4.

*If Apple has no time or money to fix this then We need and official downgrade option* if not then its Android for me.

My Iphone is making *my life miserable*, one of the reasons I left windows mobile phones and windows PCs and bought into apple.

Yes. A LOT of people have this issue. The OS was not made for this hardware.I reverted back to 3.13 last night.I found a page that had detailed instructions using Google and had it back to what I wanted in about 1 hour or so. Apple get your crap together before you commit suicide.
Lee

Use to love my iPhone 3G but with IOS4 I now HATE it!!! Very slow to the point of useless. If this was my first experience with Apple or iPhone I would never purchase again. That is coming from someone that owns a MacPro, AppleTv, 2 iPhones, and an iPad. Apple MUST fix this issue! I feel as though I am being forced to upgrade... when I probably would have any way, but do not appreciate being forced to do so prematurely...

I have downgraded to iPhone 3.1.3 after 4.0 made my phone almost unusable: extremely slow, keystrokes lagging, very very painful. The downgrade was quite easy and now my phone functions just fine (with the exception of those apps. that require 4.0).
This needs to be fixed.

sorry for my english , i see now the video of apple "antenna gate"
i am happy to know apple love me , and he is really
i have a iphone buy in may, but one week back i update to 4.0.1 and now my iphone 3gs is really slow and for me work really bad.
befouse this great update my iphone work great and i am happy, now...


is really if i reset my phone work better my 3gs with 4.0.1?
why is impossibile to return back to 3.1?

I tried everything posted here and my iPhone 3G with iOS 4.01 remains SLOW! This is not acceptable. I use Skype with my wifi connection a lot and it is impossible to use now. I have to wait 2 secs for a digit to appear on the screen after I press a number. It is really ANNOYING! We need a fix NOW!

I have the same issue, since I upgraded to iOS4 I've been experiencing slow performance on my phone. By now, the only thing I tried is a 'double reset' and it has running faster, but after a couple of days its performance became slowly again.

I hope that Apple resolves this issue ASAP.

Downgraded to 3.1.3 after 4.0 ruined my iphone 3g! I'm back now baby but I am done with Apple products from this point forward. How they could not acknowledge this problem is beyond me. Everything that I use to love about Apple has slowly disappeared as they have gotten bigger. I hope my 3g lasts for a long time but if not Droid hear I come!

I haven't upgraded my own 3G yet, thankfully, but I'm visiting my brother's house and his wife has an iPhone 3G that's running iOS 4. I borrowed it to look up some maps and was immediately struck by how slow it was. There are frequent 5 second pauses where it doesn't respond to input at all, scrolling in list views even in simple apps like Settings is jerky and sluggish, there's a several second delay between pressing the Home button and the phone actually returning to the home screen...

I tried the tip from http://discussions.apple.com/thread.jspa?threadID=2475859&start=658 (actually a link to http://www.davekawalec.com/2010/07/3-steps-to-fix-iphone-3g-slowness-after-ios4- upgrade/) which everyone keeps reposting in this thread, but it didn't seem to make a difference. Still slow. Maybe better, hard to tell since I'm not making quantitative measurements, but it's still really bad.

I'm in the same boat-- iPhone 3G became slow to the point of being virtually unusable after accepting iOS 4 update. I did a factory restore, which helped, but only temporarily before my phone than lost its responsiveness again. I now have to do double hard resets on a regular basis (up to 2-3x/week) in order to get it to speed up again. It hangs when I try to unlock it, when an application is bringing up the keyboard to enter text into a field. The double hard resets seem to help for a while. This has been very disappointing.

I am extremely disappointed about the performance of my iphone 3G since I have updated to OS4. As a loyal customer and brand ambassador I expect more! I have convinced by wife, my parents, brother, sister, boss and countless friends to own an iPhone and was even tempted brave the elements and get in line to get the iPhone 4 in its launch here in Australia. I am now re-considering my next purchase.....

My confidence in Apples pursuit for a quality execution has been shaken due to this dodgy upgrade. Using my iPhone was always a pleasant and enjoyable experience but now it is just very frustrated. I have to wait intolerable amounts of time for simple functionality like SMS!!

If you haven't upgraded to OS4 DON'T!

Unless I am plesantly surprised by apple in near future I will feel no option but to express by disapointement in the Apple brand publically and persuade other buyers to go else where.