Apple announced iOS 4 in March 2010 and it was released to the public on June 21, 2010, alongside the iPhone 4. It was the first version of the operating system to be called "iOS", due to the iPad being released. With this release, Apple dropped support for the original iPhone and the 1st gen. iPod Touch, which is the first time Apple had dropped support for any device in a iOS release. The iPhone 3G and the 2nd generation iPod Touch were capable of running iOS 4, but had more limited features. For example, both devices lacked multitasking, and the ability to set a custom home screen wallpaper. This was also the first major release to be free of charge for iPod Touch users. The release of iOS 4.2.1 brought compatibility to the original iPad and was the final release supported on the iPhone 3G and 2nd generation iPod Touch due to huge performance issues. The release of iOS 4.3 added support for the iPad 2.[51][52] It was succeeded by iOS 5 on October 12, 2011.
iPhone 3G Custom Firmware 4.2.1 8C148 105
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