It has been reported by many iPhone 3G users and was also acknowledged by Apple that iPhone 3G running on iOS 4.0 to 4.0.2 has performance issues. They were reported from the beginning when iOS 4 was released but Apple didn’t take any step to fix this in the previous two releases. This matter was taken up by an annoyed user and sent an email to Steve Jobs.
I’ve waited patiently through 4.0.1 and 4.0.2, looking for a fix that will make my phone work again. I’ve read the forums that advise me to jailbreak my phone or use some other method so I can downgrade back to a version of iPhone 3, however I’m not prepared to use a method that is not supported by Apple.

Steve Jobs responded with a short and to the point statement:
Software update coming soon.
Sent from my iPhone
As we already know that iOS 4.1 is going to be next iOS update which is expected to be released when iPod Touch 4G and Apple TV are revealed in Apple’s tradition media event held in September. This “Coming Soon” from Steve Jobs is rather surprising as event is still weeks away probably.
[Via MacRumors]
You may also like:
Jailbreak iPhone 4 | Jailbreak iPhone 3GS 4.0.1 | Jailbreak iPod Touch 4.0 | Jailbreak iPad 3.2.1
The jailbreak guides for current iOS 4.0.2
Jailbreak iPhone 3GS 4.0.2 [Old Bootrom] | Jailbreak iPhone 3G 4.0.2
Our analysis regarding upcoming Jailbreak 4.0.2
Jailbreak iPhone 4 4.0.2 | Jailbreak iPod Touch 4.0.2 | Jailbreak iPad 3.2.2
We also put down some thoughts and expectations regarding Jailbreak 4.1
Jailbreak iPhone 4 4.1 | Jailbreak iPhone 3GS 4.1 | Jailbreak iPhone 3G 4.1 [Guide]
The tools expected
Spirit Jailbreak 4.1 | Jailbreakme 4.1


{ 3 comments… read them below or add one }
I have downloaded and installed 4.1 beta 2 but I am unable to unlock and jail break, anyone can help me to do this? And it wouldn't unlocked until i downgrade……… because it has 05.14 baseband already……… So is there anyone genius to unlock and jail break it?
Which iPhone you have?
know anybody when should be firmware 4.1 with jailbreak out?