
iPhone OS or iOS 4.0 which Apple promised to be released on 21-June is now available for download. If you live outside of the US, it may take sometime for update to appears on your iTunes as what I have experienced late last night when iTunes still detect that iPhone OS 3.1.3 in my iPod Touch is still the most updated OS. It appears only this morning the the OS4 is available and ready to be download.
If even until this moment you still don’t see iOS 4 update in iTunes, please verify that you’re running iTunes version 9.2 as only this version support iOS4.
For iPhone users that use unlocked or jailbreaked iPhone, always bear in mind it will wipe unlock and jailbreak software in iPhone, so be prepared with all necessary software.
As what have been mention on previous post as well as other tech blog, only iPod Touch 3rd and 2nd generation, iPhone 3G and iPhone 3Gs will receive an update to iOS 4.0, but not every iOS 4.0 features will available in that devices. Except iPhone 3GS, couple of killer features that confirmed are missing from the rest of devices are multitasking, home screen wallpaper, bluetooth keyboard support and screen lock.
With over 100 feature introduced in iOS 4.0, this numbers will grows as more older devices getting update and began using it.