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It works fine but will make u want the 4 because usually apps in the 3rd page of multitasking have to force quit due to only having 256MB RAM ;)
 
Is some bugs that can cause rapid battery drain, but maybe Apple will fix that, also the slightly laggy menus on some occasions are apparently fixed in 4.1
 
4.0.1 working very nicely for me.

Even JB'n running Winterboard (Aqwoah theme), MCleaner, Backgrounder, SBSettings, and Activator, it's snappy enough for me and no 'sad iphone' screens.

However, yesterday I added Lockinfo, and started having the sad iphone screens a lot, so I've deleted it this morning.

Although....if you are not already JB'n, and have your SHSHs stored, you'll be installing 4.0.2 the standard way with iTunes. 4.0.2 isn't JB capable yet (and probably won't be).
 
I have absolutely no trouble, and mine is a 3GS White 32GB model.

I bought this one last year and upgraded the day it was released and it works fine, just remember it has a slower CPU then the ip4 so it will be a little slower but it is reasonable to use without issues.

Good Luck
 
Thanks everybody! Keep em coming, I'd love to hear more.

I won't be jailbreaking, so I'll avoid any issues related to that. So far the only scary problem in this list so far is:

It works fine but will make u want the 4 because usually apps in the 3rd page of multitasking have to force quit due to only having 256MB RAM ;)

What does that mean, and has anyone else experienced that?
 
I haven't had any problems on my 3GS (I'm still on iOS4 and jailbroken).

I did notice that my battery life had dropped a bit after jailbreaking a few weeks ago, so I did the whole run the battery down until the phone dies and charge to 100%, and now the battery life is fantastic.

But since you're not planning to jailbreak, you shouldn't have any problems at all (not that you'd have any if you did decide to jailbreak). Before the jailbreak was out and I was running the phone stock with iOS4, I didn't have a single problem. No lagging, no dragging, nothing. The new OS really works well on the 3GS and the amount of memory on the 3GS seems to be very sufficient.

:D
 
I've had no issues whatsoever with running iOS4 on my 3GS. It works a charm. As for running out of RAM, iOS manages memory in this regard by shutting down apps when it needs more RAM memory.
 
my experience with iOS4 on 3GS was poor. worse battery and laggy jerky interface just to get poor mans multitasking due to the lack of ram. i would have reverted instantly had I not had the need for dual exchange accounts.
 
Your exactly right. if you would of had the black 16gb model tho, you would of been screwed.

Really? Read my post above and hint, hint...I've got a 16gb 3GS.

No, OP, you wouldn't be screwed running iOS4 on a 16gb 3GS. In fact, it's apparent that Jhandson09 has absolutely no idea how phones work, and thus shouldn't be contributing (if that's what you want to call it) to this conversation.

I say go for it. I think you'll like iOS4 on your 3GS.
 
In fact, it's apparent that Jhandson09 has absolutely no idea how phones work, and thus shouldn't be contributing (if that's what you want to call it) to this conversation.

Dude, he made an attempt to be funny, but failed.
 
Surely said:
Who are you to tell me how it worked on my iPhone? Were you there, looking over my shoulder, as I used it? :rolleyes:

I'm the guy who tells you to stop talking rubbish. ;)
 
Best bet to make iOS4 run well on a 3GS is to install the Firmware, then set up phone as new, and don't use any backups etc for settings
 
Best bet to make iOS4 run well on a 3GS is to install the Firmware, then set up phone as new, and don't use any backups etc for settings

I didn't do this and my 3GS works fine. No doubt this depends on the set of apps installed. I'd try just doing the update as normal and if that doesn't work then setup as new.
 
Best bet to make iOS4 run well on a 3GS is to install the Firmware, then set up phone as new, and don't use any backups etc for settings

Yea, I retract my previous statement. This changes everything and improved my phone ALOT!

Second both these statements.....

The only thing that's a PITA about 'setting up as new' is that with many of the games, you lose your 'place' of where you were and/or high scores. Like Angry Birds, Real Racing, etc. I have to tell myself it's only a game anyway. :D

Most of the business class apps don't have this problem with switching from one major OS upgrade to the next, as many have an external way to backup and restore the data without using the iTunes process.
 
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