Slow iPhone 3G after iOS 4

I sent in feedback to Apple, too. My daughter and I both have an iPhone 3G. Mine won't be two years old until Jan. 2011 and hers won't be two years old until Jan. 2012. We both have AppleCare until then, as well. I don't want to spend hundreds of dollars on new phones and new AppleCare for both of us now, when we used to love and be satisfied with our 3G phones.

I've been an AppleFanGirl since 1982, and you can see from below, I still am. But I feel betrayed and abandoned right now!

If the rest of you are unhappy, PLEASE let Apple know. Maybe they'll send a fix for us, but since they've discontinued our 3G, I'm afraid they don't care.

Those who are having performance issue on Iphone 3G after update to iOS4, please read my story here.

I, too, was having exactly the same issue after updating to iOS4, and I wasn't too surprised to see all these comments everywhere about the performance issue under the same configuration. However, I was still puzzled by those who claim no such issue exists.

Anyway, just yesterday, I had enough of my iphone 3G /w iOS4, due to its lagginess, and decided to downgrade back to 3.1. Found the article at Lifehacker, and managed to reinstall 3.1.? firmware I already had.

Then I ran into a major problem. I realized I did not have a valid backup of my iphone /w OS 3.1. Well, I had no choice but to reinstall iOS4 and get all data back, copy them by hand if necessary go back to 3.1.

Well, then something surprising occurred. I "restored" iOS4 firmware then "restored" the backed up data, instead of "updating" to iOS4, then I realized it became much faster!

So, those who are having performance issues, try this. Back up your data, "restore" firmware, then "restore" your data.

Some claimed that having "hardware reset" also has the same effect, but I cannot confirm. What I can confirm is that my iphone 3G is running iOS4 and it was nothing like this after initial update to iOS4!

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I updated a few days ago, and i noticed my phone load apps faster. However my Wi-Fi stopped working, it picks no signals even if i place the phone on the actual router. Apple has no clue what it's doing. I was going to get the 4G over the Blackberry Bold 9700, but not anymore!

I'm afraid You might be right

A daily reboot would br fine if it would turn back on without fighting it. If I shut this thing off and try to restart it, it just hangs there trying to restart after about 6 times of turning it off and on it will start 10 min later the battery is DEAD and the whole process starts over.

Been there done that, still the same trouble.

I heard that they put a shock sensor in the i4(kind of like they use in shipping boxes that are fraigle) and if it breaks they will not warranty the phone

My 3 year berry does and it works flawless.

I had the same problem, but here is how I solved it. Now, iOS4 works fine on my iPhone 3G. Basically, I restored the iPhone to factory settings, then reinstalled everything. Takes about a couple of hours, but well worth it. Note that I use iCal and the Mac Address Book to manage my contacts. So if you're using something else, be sure you back up the data so that you can resync after you restore the iPhone to factory settings.

1. Update all of your Apps.
2. Sync your iPhone, so that iTunes has all of your latest data: calendar, contacts, notes, etc.
3. In iTunes, click 'restore' in the summary tab. This will reset the iPhone to factory settings.
4. After it has been restored, you can reinstall your iPhone using "reinstall from new" instead of "reinstall from backup." It may not say "install" but it's something to that effect. Sorry, I should've wrote it down, but I think you get the gist of it.
5. Now all of your data and apps should be reinstalled onto your iPhone.
6. You'll have to re-do the setting for your iPhone and Apps preferences, but at least your iPhone 3G will be back to normal.

I have tried this many times on 3 different computers and it still don't work.


"factory settings" is a misnomer because everything else I have when you go back to factory settings it winds up JUST LIKE WHEN IT WAS MADE not to the most current of anything.

I want to confirm that I've did every single suggestion posted (short of reverting back - oops I mean hacking back to OS3) and my phone is still sluggish. Some phones are not experiencing these problems and are running fine with OS4 - some are not... mine is one of them. I don't think it's too much to ask for a "revert" option if you don't like the new OS - or it's not a recommended upgrade for your phone...

Did Apple rush this? I'm sure they did after that disaster with the "lost" phone... maybe, just maybe with the corrections they plan to release in the next week or so that will address this - and other issues. Although I'm rightously ******, I'm not ready to ditch my iPhone and go back to Blackberry or towards a "Droid"... but if this continues, I will certainly weigh my options... like mailing this phone back to Jobs and co...

My ipod touch is extremely slow as well. I have restarted and cleared all the memory and it is still painfully slow. I want to downgrade or get a fix from apple.

I wrote an open letter to Mr. Jobs that I think summarizes how we all feel...

http://dis.mantle.me/?p=208

you will not regret opting for the bold we have 2 iphones and I have a 8900. I wouldn't trade my 8900 for anything.

Had the same issue slow after update.
The fix , back up ur contacts and restore the Phone, after it is done set up as a new phone and then sync all ur apps and etc.
Now my iPhone is faster then with 3.13