iPhone 3G very slow with iOS4

This may be pretty obvious, but did you restart yet?

My 16gb 3G was ridiculously slow at first. To the point where I wasn't even seeing the unlock phone animation while swiping the phone to turn on.

I restarted once, and then found it to be faster than it was on iOS3. In fact compared to the 3GS that I was just updating it was doing many actions quicker oddly enough.

I've had no issues on my 3G, if anything it's running quite a bit faster, and my apps are loading up from the net faster (the ones that need to sign in)
2 thumbs up for this update, and I still have tethering

I've noticed it running slower also. Not scrolling around the menus, but inside games. The FPS is much slower...unplayable.

That stinks. Why does Apple make the os available if the former phones can't run it adequately?

I had the same problem. My iphone 3G gotten slow and sluggish after I upgraded the iOS4. Apps took long to load and inside some Apps it responded slow as well.

SOLUTION:

I Think I Know Why and How To Get iphone 3G To Work Smoothly Again With iOS4.

-I restore my iphone 3G from iTunes.

-After it Restored, I did 1 thing different from my 1st initial upgrade. I did NOT try to retrieve my contacts and other info from the "RESTORE FROM BACKUP". That was the difference.

-After you're done, Back in iTunes, be sure to select "Setup As New Phone" to avoid Retore from Backup prompt.

-In order to get my iphone 3G to work smoothly again. That was my sacrifice.

Hope this Helps

Slow and unresponsive is all i see from ios4, few different inbox arrangements which do little, so not classed as an improvement. I have timed it from input/swipe/touch etc to activate feature is 5-6 seconds, max. It feels like my MBP did with the stock 2gb ram working on raw files, stuttery and slugish. great one..

@pacific rim: Your solution is interesting. I have 3G and am about to do that, but I'd like to ask you if you really don't experience any slowness so far.

Mine was slow very annoyingly slow to the point where it doesnt want to do anything at all.OS4 is no good for the 3G at all in my opinion.I have tried all the things mentioned to no avail,so i have downgraded to 3.1.3 again and its back to its normal happy self.

stormchaser said:

Mine was slow very annoyingly slow to the point where it doesnt want to do anything at all.OS4 is no good for the 3G at all in my opinion.I have tried all the things mentioned to no avail,so i have downgraded to 3.1.3 again and its back to its normal happy self.

Click to expand...

How did you downgrade to 3.1.3?

infosprt said:

How did you downgrade to 3.1.3?

Click to expand...

Same question. I'm in the same boat. I really should not have upgraded without making sure there were no major issues.

http://findtut.com/easy-steps-to-downgrade-from-ios-4-to-ios-3-1-3-536547

Follow all the steps in this link guys it works perfectly.Definately recommend it.
Good Luck

I can't believe they put this crap out there. Really makes me wonder what is going on over there.

stormchaser said:

http://findtut.com/easy-steps-to-downgrade-from-ios-4-to-ios-3-1-3-536547

Follow all the steps in this link guys it works perfectly. Definitely recommend it.
Good Luck

Click to expand...

This process worked for me too.

My iPhone 3G is also extremely slow since upgrading to OS4. Apple really let us down with this one!

Seems like they are forcing 3G owners to buy the iPhone 4. That in itself wouldn't be to bad considering what the iPhone 4 has going for it, but signing a new 2 year contract with AT&T is a huge bust. I had hoped to wait out the upgrade until Verizon got the new iPhone.

This is how I fixed the problem

Instead of downgrading (since i wanted the folders feature), I just did a restore without doing it from a backup:

http://www.brandonmartinez.com/2010/06/23/get-a-faster-iphone-3g-with-ios-4/

FIX the SLOW performance on iPhone 3G with iOS4

JUST DO A HARD RESET!!!!
nothing else.


to FIX the SLOW performance on iPhone 3G with iOS4, just do a Hard Reset: press and hold the lock button and the home button together till the iPhone shutdown. Wait some seconds (15 +-) and then turn it on again.

do it twice.. or even more.
I had to do it 3 times.

It fixes a lot of things on iPhone and my iPhone 3G is running as fast as ever.

=D

thought it was just me, I went from my 3gs with ios4 to a 3g and I updated that phone to ios4 before using it and it was unusable.

Now i'm on my iPhone 4 and it's so much quicker/usable.

I've been experiencing some performance problems as well with my iPhone 3G after upgrading to iOS 4 at the end of last week. Restarting the phone seems to help a little bit, but I'm not convinced it helps--if it does, the sluggishness certainly comes back over time.

I seem to remember similar performance problems when iPhone OS 3 came out last summer that improved with the the update to 3.0.1. Anyone else remember this being the case? or am I imagining things.

Before iOS 4 was available for download, I was planning to get an iPhone 4 later in the summer so I guess these performance woes will be over then, but I'm holding out some hope that the situation for my iPhone 3G will improve when 4.0.1 (or whatever) comes out.

robsonnunes said:

JUST DO A HARD RESET!!!!
do it twice.. or even more.
I had to do it 3 times.

Click to expand...

Mine is still slow and buggy; I must have reset it 20 times still with no improvement.

It's not just that it's slow; apps quit where they never did before (ie. safari browsing MR, viewing or deleting emails), it freezes, and it restarts itself.
Basically gone from being indispensable to a piece of crud.
Am going to try reinstalling again. Perhaps from DFU mode or something.

Saving grace is I've an iPad, and black iP4; waiting for a white to replace this one tho.

Plus 1

Chalk me up for major lag on a 16G 3G phone after upgrading. So bad I did not upgrade my wife's phone. I've hard powered off a couple of times (traveled on a plane and was forced to). That seemed to stop the rash of app crashes but still the sluggishness persists.

iphone upgrade made my phone super slow

unfotunately the phone is running very slow. The SMS feature has problems when typing. Or when loading pics or even running the ipod is a pain!...

Put it back to 3.1.3 guys.The 3G can,t handle OS4 and a hard reset does nothing to it,just stays the same.

My 3G was also EXTREMELY slow with OS4. I really don't know why they would release it for the 3G!! I thought that it may seem faster over time but it was just not usable. I downgraded back to 3.1.3 and I noticed a huge difference.

I'm going to upgrade to an Android Nexus One on Monday and avoid upgrading to the iP4 problems.

Cheers.