Read the release notes on here and on iTunes when you click "Check For Update".
They never said they were fixing the 3G being buggy. This is the problem on here, people having expectations of things that were never going to occur.
The 3G is old, it's dated, old hardware cannot keep up with the latest software ... it's the nature of technology.
But assuming, or expecting, somehow that an update for the signal bars (which was made abundantly clear on here over the past 24 hours when the beta was released), would fix your buggy 3G is just way over zealous.
Warning to potential unlockers/jailbreakers!
DO NOT update! That is always the recomendation the iPhone Dev team makes when a new OS is out. If you want functionailty and the unlock stay at the lowest OS version possible. In this case for iPhone 4 user's 4.0.0
http://twitter.com/chpwn/status/18622061360
SHSH signing window for 3.2 and 4.0 is now over. Hope you saved them, you had plenty of time. If not, you should have, no complaining.
even on official unlocked iphone 4 ???
M..M..Mac?
What is this "Mac" that you speak of?
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Trying to be a bit scientific ish about this i have tried out speed test app on this.
Before the update, i could easily get the grip of death to completely kill my 3g signal such that the speed test app would not work at all.
after update speed test is still working - when holding it in the grip of death (!). In fact, i just got my fastest ever download speed on O2 of 2.6meg!!
Can folks give this approach a try. The reason i was using speed test app was that i never trusted Apples excuse of a software error and the app give an independent view. Based on the speed test app results i was close to returning phone and going back to my iphone 3g until a hardware fix came along.
Final observation - the ping/latency remains pants when holding in grip of death
Read on another forum is has improved the 3g so up yours!
even on official unlocked iphone 4 ???
So please, don't whinge at me because you've got older hardware.
Can I say goodbye to the 'lost network provider' dialog now please?
Don't be clever.
It's all built on Mac OS, and you know it.