Iphone 3G slow after update to IOS4

The upgrade to IOS4 took forever but eventualy was completed succesfully.
But the iphone is very slow with IOS4. It doesn't work as smooth as it used to be. Also new applications such as the iBook application are very slow, doesn't respond smooth on screentaps etc. Who has the same experience?
I'm thinking about going back to version 3.1.3 because IOS4 doesn't add anything to improve the user experience on the iPhone 3G.

I hope Apple will listen to their iphone users and will release an update soon for iOS4 which improves the performance on older iPhones.

Iphone 3G, iOS 4

Posted on Jun 24, 2010 1:14 AM

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Posted on Jun 25, 2010 1:12 PM

Irons you can try this "magical" process to get to 3.1.3 again, just takes a few steps to follow closely but yes you can.

For both PC and MAC:
http://lifehacker.com/5572003/how-to-downgrade-your-iphone-3g%5Bs%5D-from-ios-4- to-ios-313

I just downgraded my 3G from 4.0 to 3.1.3 and it works just as before. Familiar icons, speed is back. Just pay attention to all the steps as there are unique files for 3G versus the 3GS model, each of which are listed there.
1,824 replies

Jul 12, 2011 12:43 PM in response to scottyltd

You could also do a HARD RESET, twice for maximum effect.

To do a Hard Reset, hold both the Power and Home Button for a while.

When the Slide to Turn Off option appears, ignore it.


After that the phone will shut, but keep on Holding both the buttons and then the Apple logo will appear.
Let it load, repeat the process..

This should successfully speed up your sluggish iPhone 3G.

Well it did mine 🙂


Message was edited by: fchaghtai

Jul 18, 2011 1:07 PM in response to Leann O.

Scratch my last post. I decided to return the 3GS to the AT&T store and order a refurb iPhone 4 (but I can't order for 72 hours since my return is being processed through the AT&T system). I am using my old 3G again. I had put iOS 4 on it because I anticipated either selling it to buymytronics.com or on eBay. It is pretty slow, especially now that I've used a 3GS and saw the speed difference. I've said this before and I will say it again: Apple should have made 3.1.3 the end of the line for the 3G. iOS 4 is terrible, terrible, terrible on a 3G, at least in my experience and the experience of many others on this forum.

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Iphone 3G slow after update to IOS4

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