其實JB 這件事我是會，但是從來沒有試過解鎖，不知有沒有好心的網友願意幫忙或者指教，手上有兩隻3Gs一支為4.1bb5.14.02另一支為4.31bb5.16.02.
我現在旅行到台灣，只有帶Mac ，謝謝好心的網友指導及幫忙
可至 Cydia搜尋 ultrasn0w 安裝並unlock
除了上述的 baseband以外... 是無解的喔.
However, you will lose your iPhone 3GS's GPS capability.
This upgrade is also irreversible. You can also never restore to stock version of iOS, as it will result in an error.
In other words, you can only use pre-jailbroken IPSWs to restore.
The New Flying MacBook Pro; Seatbelts sold Separately!
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