Apple Releases iOS 4.0.1 for iPhone 4, iPhone 3GS, and iPhone 3G
Apple today has released iOS 4.0.1 in a bid to fix the reception issue which has been plaguing iPhone 4 users since its launch last month. This new update addresses the reception issue which is experienced when the phone is tightly griped in the left hand.
iOS 4.0.1 is fully supported on iPhone 4 and iPhone 3GS. iPhone 3G is also supported but the users are officially unable to do multitasking and wallpapers unless you know where to look for it. An iPad version of iOS 4 is also expected to be released by fall 2010.
To update to iOS 4.0.1 for iPhone, all you need to do is to connect your iPhone with your computer via USB and start iTunes. You should now see a message as shown below. Simply click on “Download and Install” button to get on to the new iOS 4.0.1 firmware.
Note: Except for iPhone 4, all iPhone jailbreakers and unlockers are highly recommended to stay away from this release. This release may contain new baseband which might not work with ultrasn0w 0.93. If you rely on an unlock and update to this firmware now, you will lose your unlock for God knows how long. You have been warned!
Direct Download Links for iOS 4.0.1 (Official from Apple)
UPDATE 1: After thorough testing, it turned out that baseband and modem firmware for all iPhones hasn’t been updated in iOS 4.0.1 since iOS 4. What this basically means is that you can still unlock your iPhone on any baseband using ultrasn0w, guide for which can be found here. But since currently there is no jailbreak tool available for iPhone 4 and iPhone 3GS (newbootrom), and the current jailbreak tools for iPhone 3GS (old bootrom) are not compatible with iOS 4.0.1 yet, so the only device which can be currently be jailbroken and unlocked on iOS 4.0.1 is iPhone 3G, guide for which can be found here.