iPhone OS 4.0 is already jailbreaked using iPhone Dev Team’s Redsn0w 0.9.5, to sync it with beta releases of iPhone OS 4.0, dev team has released latest version of Redsn0w, Redsn0w 0.9.5 Beta 4 which can jailbreak iPhone OS 4.0 Beta 4 on iPhone 3G.
iPhone OS 4.0 is only available to the developers hence by no means casual iPhone 3G users should attempt to download & install iPhone OS 4.0 also there is no unlock tool for iPhone OS 4.0. Redsn0w 0.9.5 Beta 4 is only targeted to developers of jailbroken apps. If you want to know more about redsn0w 0.9.5 then head over to iPhone wiki.
Redsn0w 0.9.5 Beta 3 Supports
1. iPhone 3G only (for now)
2. Mac OSX only (for now)
3. The 4.0beta1/beta4 FW only (for now)
Download Redsn0w 0.9.5 Beta 4 to Jailbreak iPhone 3G 4.0 on Mac OS.
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