Apple has just released iOS 4.1 (build 8b5080c) for iPhone 3G, iPhone 3GS, iPhone 4 and iPod Touches. As promised by Apple, this update is supposed to solve the signal reception issue in iPhone 4. This build of iOS is only available for developers, so if you have a registered Apple Developer account, you can download the update by signing into iPhone Dev Center.
Download iOS 4.1 Beta and SDK
Please note that upgrading your jailbroken and unlocked iPhone on iOS 4 to iOS 4.1 will put your iPhone back to un-jailbroken and locked state. So it is recommended not to upgrade to iOS 4.1 as there is no official jailbreak and unlock tool for the said update available at the moment. As soon as iPhone Dev Team releases any tool for jailbreaking and unlocking iOS 4.1 on any of these iDevices, we will update you here!Contact Us for News Tips, Corrections and Feedback