Dears this is my first torrent so if not good then please forgive me. This is IOS 5 Beta 2 for iphone 4 GSM. Don't ask me as how to upgrade it on your iphone 4 as i have not tried it on my iphone 4. Just google arround and find to use it. But don't use it to uograde if you don't know how to upgrade your iphone as you will not like to have such an expensive paper weight.