轉貼:http://www.wretch.cc/blog/MCUDESIGNER/22816455 iPhone Dev Team剛剛發表了一個很嚴重的警告:「如果您想要「保持越獄和解鎖」的話,千萬別在今天iTunes跳出iOS 4.1更新視窗時按下更新,那是一個陷阱。大家都知道4.1會讓您失去越獄和解鎖,就算您有備份SHSH可以降到4.01,但Baseband目前還沒有辦法回復,就算是Ultrasn0w也沒辦法解鎖
This time of year there are lots of new iPhone owners, and not everybody knows that accepting new iOS updates is the surest way to lose your jailbreak and/or unlock. While those of you who have Cydia or TinyUmbrella backups of your FW hashes will always be able to get back to 4.0.1 if you make this mistake, this doesn’t hold for unlockers. There’s currently no known way to revert your baseband — if you update your baseband you’ll lose the ultrasn0w unlock, possible forever. Please stay away from this 4.1 release until a safe jailbreak procedure (which also preserves ultrasn0w) is developed and released.
P.S. There are a tiny number of iPhone3G owners who can revert their basebands due to a flaw in very early bootloaders…you will already know if you fit in this category