Slow iPhone 3G after iOS 4

We're in the same boat, tried rebooting, restarting, looking for updates to 4.0.1 but the iphone 3G that we have ran the update but now is slower than ever, no signal strength (even in the wide open sky) and boots itself back to the main screen while on a call. (BOTH phones).

Any news on an update or fix yet?

Apple does not post here about technical matters. If you saw such a post it would be a fake.

Dude, complain if there is no solution. We know that the solution is to downgrade and be happy again or just wait until apple fix the OS so you can get it.

Now, if you really want to be heard by apple, instead of posting your complaints and/or suggestions here in the forums, submit feedback. That's more likely to be read by them.

Don't get me wrong, though. If you read my older posts, I complained a lot!! But now that there is a way to go back to "happy iPhone 3G" again with 3.1.3, I just did it and I'm not suffering anymore. If apple wants to drown in their bad practices, now that's not my problem. It's theirs. Though it would be sad to see such a company go down.

Peace

I just followed the pretty simple instructions here http://lifehacker.com/5572003/how-to-downgrade-your-iphone-3g%5Bs%5D-from-ios-4- to-ios-313 and restored my phone back to 3.1.3 with little problem.

The only thing I would advise is to be sure you have a backup of your 3.1.3 image in AppData\Roaming\Apple Computer\MobileSync\Backup before you start the process otherwise you have to create a whole new image on the phone. Not a big deal, but just takes awhile.

I, also, am disappointed at how slow my phone is now after the update. I wish I had not done it.
I also cannot get my calendar to sync with my computer, everything is 90 minutes out, as I was in a different timezone when I did the update. Even though I have changed all the settings , it won't syc through iTunes or MobileMe.
Is it possible to go back to the old version?
I also lost all my notes, some apps and contacts when I did the update.
This drives me crazy.
Help, Apple, help.

I love my Iphone 3G, but with the new OS 4..I'm so disappointed from Apple.Soooo slow,not possible to operate at all.
Also I bought a gps app,call Copilot.Now is missing from my phone after restoring,also is missing from my purchases in the store.

Hi,

I followed your advice and my iPhone is really fast now.
Thanks for the info.
Marc.

isoToxin gave this advice and it worked great for my iPhone. It is really fast now.

post from isoToxin :

Despite being hesitant, I upgraded my 3G last night, and I'm very surprised at the performance because it's actually a bit faster than 3.1.3 was. :o I'm wondering though whether a lot of the reported issues with performance on the 3G come from doing an "update" in itunes rather than a "restore". As I understand, and update will simply try and "work around" your existing data on the phone and fit IOS4 in where it can. A restore will format the entire phone, and install IOS4 fresh. I installed IOS4 by choosing the "restore" option in itunes, and of course after this was finished I was left with a completely blank phone. Once that was done (only took about half an hour), I proceeded to hook up to itunes and restore from my backup. I then synched my apps (which took a while, about an hour), and now I'm gradually filling it with music/films again. I'm really pleased with IOS4 so far, the speed of certain things (like the menu transitions, and the browser) has definitely improved on my device. There are the odd moments where the phone will pause for a few seconds, but I had this frequently on 3.1.3 and it's certainly no worse (as I was lead to believe it would be). I'd recommend to anyone having issues to

1. Take a full phone backup

2. Choose "restore" in itunes.

3. Restore from backup afterwards.

Worked great for me.

OK, I understand the pain. I was so angry when my 3G iPhone was turned into a piece of junk my the 4.0 software. But how many of you who are justifiably whining about this have even TRIED any of the solutions that have been offered here and elsewhere??

This one worked for me, and now my phone is snappy and working fine on 4.0:

Go to settings/general/home button/spotlight search.

Uncheck all items.

Exit.

Press and hold the sleep and home buttons until the phone restarts (Keep holding when you see the power off slider. Wait until you see the apple logo, which indicates it's restarting)

When the iPhone has rebooted, go back to settings/general/home button/spotlight search, and re-check all the items.

It worked for me, and now I'm not whining anymore. I hope it works for you too!

I had the same problem. I Cleared my History, Cookies and Cache. Settings>Safari> scroll down, you will see all 3 items to clear. I cleared all of them, then did a hard reboot. At least for now, my phone is working better. I wish you luck. I hope Apple comes out with an update soon.

If anyone starts up a class action let me know. I'm in! Gonna try an Android on a non-AT&T provider...

THE ONLY WAY FOR THE 3G TO WORK WITHOUT PROBLEMS IS TO DOWNGRADE TO v3.1.3.

Its all button clicks, no special codes needed.

Follow these easy instructions:
http://lifehacker.com/5572003/how-to-downgrade-your-iphone-3g[s]-from-ios-4-to-ios-313

You'll need to get the 3.1.3 firmware.. get it here:
http://www.iclarified.com/entry/index.php?enid=750

You'll need to get RecBoot.. get it here:
http://www.sebby.net/443-recboot-final-release/
RecBoot basically clears and error message

BEFORE you do this Backup pictures from the camera roll before doing the downgrade. And do a last sync.

My 3G is back to its old self.

Why do you guys keep posting: "THE ONLY WAY FOR THE 3G TO WORK WITHOUT PROBLEMS IS TO DOWNGRADE TO v3.1.3."

This is clearly not true. The steps I posted above worked fine for me (still no problems after 4 days) and others have posted solutions that have worked for them.

I understand that it's human nature to want everyone to do it the way you did it, but really....

Ampex351 - Thanks for posting this information. I downgraded last night and restored from a 3.1.3 backup and everything seems to be working fine (note, I did install .Net 4 on my XP machine as there was discussion that it may be required).

The phone is back it's old speed but I still would like Apple to create an update that will work with the 3G.

Thus far I do not get the long pauses that I had with 4.0.1 and the apps seem to be working fine.

My 3G started out fine after the update, then it got slow. Then I restarted it and it was fine. Then it got slow. Then I tried turning off spotlight, that helped, then it got slow again. Considering almost none of the new features of iOS4 seemed to have made it into my 3G, it sure acts like they did.