Emuito simples atualizar,basta ter o iTunes instalado,e seguir com as instruções de instalação.
Download iOS 4.3 Links:
iOS 4.3 download (iPad)
iOS 4.3 download (iPhone 4)
iOS 4.3 download(iPhone 3GS)
iOS 4.3 download (iPod touch 4th generation)
iOS 4.3 download (iPod touch 3rd generation)
Download iOS 4.3 Links:
iOS 4.3 download (iPad)
iOS 4.3 download (iPhone 4)
iOS 4.3 download(iPhone 3GS)
iOS 4.3 download (iPod touch 4th generation)
iOS 4.3 download (iPod touch 3rd generation)