更新固件注意事項：

   * 新固件會帶來新功能，但同時會封鎖現有的越獄，也會升級基帶，導致無法解鎖

   * 如果你需要越獄或者解鎖，請管住自己的手，不要升級，等發佈新版越獄和解鎖程序之後再升級

    * 任何時候請務必抓緊時間備份SHSH！推薦使用TinyUmbrella（也就是通常說的小雨傘）備份SHSH文件。


從以下鏈接下載的固件和從iTunes裡下載的是完全一樣的（iTunes裡就是從這些鏈接裡下載的）

如果下載後為zip格式，請直接將後綴名zip改為ipsw

最新版的固件下載地址可以在http://itunes.com/version查找


iPhone 4
4.3.3 http://appldnld.apple.com/iPhone4/041-1011.20110503.q7fGc/iPhone3,1_4.3.3_8J2_Restore.ipsw
4.3.2 http://appldnld.apple.com/iPhone4/041-0662.20110414.byQ84/iPhone3,1_4.3.2_8H7_Restore.ipsw
4.3.1 http://appldnld.apple.com/iPhone4/041-0551.20110325.Aw2Dr/iPhone3,1_4.3.1_8G4_Restore.ipsw
4.3    http://appldnld.apple.com/iPhone4/041-0330.20110311.Cswe3/iPhone3,1_4.3_8F190_Restore.ipsw
4.2.1 http://appldnld.apple.com/iPhone4/061-9858.20101122.Er456/iPhone3,1_4.2.1_8C148_Restore.ipsw
4.1    http://appldnld.apple.com/iPhone4/061-7939.20100908.Lcyg3/iPhone3,1_4.1_8B117_Restore.ipsw
4.0.2 http://appldnld.apple.com/iPhone4/061-8807.20100811.3Edre/iPhone3,1_4.0.2_8A400_Restore.ipsw
4.0.1  http://appldnld.apple.com/iPhone4/061-8619.20100715.4Pnsx/iPhone3,1_4.0.1_8A306_Restore.ipsw
4.0    http://appldnld.apple.com/iPhone4/061-7380.20100621,Vfgb5/iPhone3,1_4.0_8A293_Restore.ipsw

iPhone 4 CDMA
4.2.7 http://appldnld.apple.com/iPhone4/041-0614.20110414.B47xa/iPhone3,3_4.2.7_8E303_Restore.ipsw
4.2.6 http://appldnld.apple.com/iPhone4/041-0177.20110131.Pyvrz/iPhone3,3_4.2.6_8E200_Restore.ipsw

iPhone 3GS
4.3.3 http://appldnld.apple.com/iPhone4/041-1009.20110503.M73Yr/iPhone2,1_4.3.3_8J2_Restore.ipsw
4.3.2 http://appldnld.apple.com/iPhone4/041-0660.20110414.Gwed5/iPhone2,1_4.3.2_8H7_Restore.ipsw
4.3.1 http://appldnld.apple.com/iPhone4/041-0549.20110325.ZxP8u/iPhone2,1_4.3.1_8G4_Restore.ipsw
4.3    http://appldnld.apple.com/iPhone4/041-0328.20110311.Lkhy6/iPhone2,1_4.3_8F190_Restore.ipsw
4.2.1 http://appldnld.apple.com/iPhone4/061-9895.20101122.Cdew2/iPhone2,1_4.2.1_8C148a_Restore.ipsw
4.1    http://appldnld.apple.com/iPhone4/061-7938.20100908.F3rCk/iPhone2,1_4.1_8B117_Restore.ipsw
4.0.2 http://appldnld.apple.com/iPhone4/061-8805.20100811.Dcr4e/iPhone2,1_4.0.2_8A400_Restore.ipsw
4.0.1 http://appldnld.apple.com/iPhone4/061-8618.20100715.Zapn4/iPhone2,1_4.0.1_8A306_Restore.ipsw
4.0    http://appldnld.apple.com/iPhone4/061-7437.20100621.5urG8/iPhone2,1_4.0_8A293_Restore.ipsw

iPhone 3G
4.2.1 http://appldnld.apple.com/iPhone4/061-9853.20101122.Vfgt5/iPhone1,2_4.2.1_8C148_Restore.ipsw
4.1    http://appldnld.apple.com/iPhone4/061-7932.20100908.3fgt5/iPhone1,2_4.1_8B117_Restore.ipsw
4.0.2 http://appldnld.apple.com/iPhone4/061-8802.20100811.XcfpR/iPhone1,2_4.0.2_8A400_Restore.ipsw
4.0.1 http://appldnld.apple.com/iPhone4/061-8616.20100715.phnt4/iPhone1,2_4.0.1_8A306_Restore.ipsw
4.0    http://appldnld.apple.com/iPhone4/061-7436.20100621.58Yt4/iPhone1,2_4.0_8A293_Restore.ipsw

iPod Touch 4代
4.3.3 http://appldnld.apple.com/iPhone4/041-1015.20110503.d7i57/iPod4,1_4.3.3_8J2_Restore.ipsw
4.3.2 http://appldnld.apple.com/iPhone4/041-0666.20110414.3QvM1/iPod4,1_4.3.2_8H7_Restore.ipsw
4.3.1 http://appldnld.apple.com/iPhone4/041-0545.20110325.We3Rt/iPod4,1_4.3.1_8G4_Restore.ipsw
4.3    http://appldnld.apple.com/iPhone4/061-9588.20110311.GtP7y/iPod4,1_4.3_8F190_Restore.ipsw
4.2.1 http://appldnld.apple.com/iPhone4/061-9859.20101122.$erft/iPod4,1_4.2.1_8C148_Restore.ipsw
4.1    http://appldnld.apple.com/iPhone4/061-8490.20100901.hyjtR/iPod4,1_4.1_8B117_Restore.ipsw

iPod Touch 3代
4.3.3 http://appldnld.apple.com/iPhone4/041-1021.20110503.8Lfs1/iPod3,1_4.3.3_8J2_Restore.ipsw
4.3.2 http://appldnld.apple.com/iPhone4/041-0667.20110414.95hVL/iPod3,1_4.3.2_8H7_Restore.ipsw
4.3.1 http://appldnld.apple.com/iPhone4/041-0552.20110325.Yt67u/iPod3,1_4.3.1_8G4_Restore.ipsw
4.3    http://appldnld.apple.com/iPhone4/061-8366.20110311.Fr45t/iPod3,1_4.3_8F190_Restore.ipsw
4.2.1 http://appldnld.apple.com/iPhone4/061-9860.20101122.Xsde3/iPod3,1_4.2.1_8C148_Restore.ipsw
4.1    http://appldnld.apple.com/iPhone4/061-7941.20100908.sV9KE/iPod3,1_4.1_8B117_Restore.ipsw
4.0.2 http://appldnld.apple.com/iPhone4/061-8554.20100811.Bgt54/iPod3,1_4.0.2_8A400_Restore.ipsw
4.0    http://appldnld.apple.com/iPhone4/061-7381.20100621.AzSP9/iPod3,1_4.0_8A293_Restore.ipsw

iPod Touch 2代
4.2.1 http://appldnld.apple.com/iPhone4/061-9855.20101122.Lrft6/iPod2,1_4.2.1_8C148_Restore.ipsw
4.1    http://appldnld.apple.com/iPhone4/061-7937.20100908.ghj4f/iPod2,1_4.1_8B117_Restore.ipsw
4.0.2 http://appldnld.apple.com/iPhone4/061-8551.20100811.Xcder/iPod2,1_4.0.2_8A400_Restore.ipsw
4.0    http://appldnld.apple.com/iPhone4/061-7435.20100621.tr49t/iPod2,1_4.0_8A293_Restore.ipsw

iPad 2 Wi-Fi
4.3.3 http://appldnld.apple.com/iPhone4/041-1012.20110503.tmmBc/iPad2,1_4.3.3_8J2_Restore.ipsw
4.3.2 http://appldnld.apple.com/iPhone4/041-0663.20110414.U7bTI/iPad2,1_4.3.2_8H7_Restore.ipsw
4.3.1 http://appldnld.apple.com/iPhone4/041-0556.20110325.64rfg/iPad2,1_4.3.1_8G4_Restore.ipsw
4.3    http://appldnld.apple.com/iPhone4/041-0368.20110311.SwtHr/iPad2,1_4.3_8F191_Restore.ipsw

iPad 2 GSM
4.3.3 http://appldnld.apple.com/iPhone4/041-1013.20110503.1m73D/iPad2,2_4.3.3_8J2_Restore.ipsw
4.3.2 http://appldnld.apple.com/iPhone4/041-0664.20110414.39vUS/iPad2,2_4.3.2_8H7_Restore.ipsw
4.3.1 http://appldnld.apple.com/iPhone4/041-0557.20110325.Jy76y/iPad2,2_4.3.1_8G4_Restore.ipsw
4.3    http://appldnld.apple.com/iPhone4/041-0369.20110311.Xzsew/iPad2,2_4.3_8F191_Restore.ipsw

iPad 2 CDMA
4.3.3 http://appldnld.apple.com/iPhone4/041-1014.20110503.52dap/iPad2,3_4.3.3_8J2_Restore.ipsw
4.3.2 http://appldnld.apple.com/iPhone4/041-0665.20110414.MbwVr/iPad2,3_4.3.2_8H8_Restore.ipsw
4.3.1 http://appldnld.apple.com/iPhone4/041-0544.20110325.Dew3r/iPad2,3_4.3.1_8G4_Restore.ipsw
4.3    http://appldnld.apple.com/iPhone4/041-0334.20110311Plgt5/iPad2,3_4.3_8F191_Restore.ipsw

iPad
4.3.3 http://appldnld.apple.com/iPhone4/041-1010.20110503.ScEp3/iPad1,1_4.3.3_8J3_Restore.ipsw
4.3.2 http://appldnld.apple.com/iPhone4/041-0661.20110414.W9Q8r/iPad1,1_4.3.2_8H7_Restore.ipsw
4.3.1 http://appldnld.apple.com/iPhone4/041-0550.20110325.Zsw6y/iPad1,1_4.3.1_8G4_Restore.ipsw
4.3    http://appldnld.apple.com/iPhone4/041-0329.20110311.Cvfre/iPad1,1_4.3_8F190_Restore.ipsw
4.2.1 http://appldnld.apple.com/iPad/061-9857.20101122.VGthy/iPad1,1_4.2.1_8C148_Restore.ipsw
3.2.2 http://appldnld.apple.com/iPad/061-8801.20100811.CvfR5/iPad1,1_3.2.2_7B500_Restore.ipsw
3.2.1 http://appldnld.apple.com/iPad/061-8282.20100713.vgtgh/iPad1,1_3.2.1_7B405_Restore.ipsw
3.2    http://appldnld.apple.com/iPad/061-7987.20100403.mjiTr/iPad1,1_3.2_7B367_Restore.ipsw

Apple TV 2
4.3    http://appldnld.apple.com/AppleTV/061-9584.20110308.Cxdew/AppleTV2,1_4.3_8F191m_Restore.ipsw
4.2.1 http://appldnld.apple.com/AppleTV/061-9978.20101214.gmabr/AppleTV2,1_4.2.1_8C154_Restore.ipsw
4.2    http://appldnld.apple.com/AppleTV/061-8747.20101122.Vgtr5/AppleTV2,1_4.2_8C150_Restore.ipsw
4.1    http://appldnld.apple.com/AppleTV/061-8940.20100926.Tvtnz/AppleTV2,1_4.1_8M89_Restore.ipsw

若直接在 iTunes 裡更新的，固件保存目錄如下：
Mac OS: /User/用戶名/Library/iTunes/iPhone Software Updates
WIndows XP: C:\Documents and Settings\用戶名\Application Data\Apple Computer\iTunes\iPhone Software Updates
Windows Vista/7:  C:\Users\用戶名\AppData\Local\Apple\Apple Software Update

iTunes for Windows x86
10.2.1 http://appldnld.apple.com/iTunes10/041-0471.20110308.Nzxs2/iTunesSetup.exe
10.2    http://appldnld.apple.com/iTunes10/061-9638.20110302.Wnzse/iTunesSetup.exe
10.1.2 http://appldnld.apple.com/iTunes10/061-9992.20110127.WdzxP/iTunesSetup.exe
10.1.1 http://appldnld.apple.com/iTunes10/061-9926.20101215.XdsP6/iTunesSetup.exe
10.1    http://appldnld.apple.com/iTunes10/061-9842.20101118.Bgyt6/iTunesSetup.exe
10.0.1 http://appldnld.apple.com/iTunes10/061-9186.20100924.nbght/iTunesSetup.exe
10.0    http://appldnld.apple.com/iTunes10/061-8246.20100901.Zxsew3/iTunesSetup.exe
9.2.1   http://appldnld.apple.com/iTunes9/061-8602.20100719.Tnz92/iTunesSetup.exe
9.2      http://appldnld.apple.com/iTunes9/061-7656.20100616.ZTns2/iTunesSetup.exe

iTunes for Windows x64
10.2.1 http://appldnld.apple.com/iTunes10/041-0472.20110308.WnT2z/iTunes64Setup.exe
10.2    http://appldnld.apple.com/iTunes10/061-9639.20110302.XcKgt/iTunes64Setup.exe
10.1.2 http://appldnld.apple.com/iTunes10/061-9993.20110127.Nju7Y/iTunes64Setup.exe
10.1.1 http://appldnld.apple.com/iTunes10/061-9927.20101215.Txsde/iTunes64Setup.exe
10.1    http://appldnld.apple.com/iTunes10/061-9843.20101118.Txdse/iTunes64Setup.exe
10.0.1 http://appldnld.apple.com/iTunes10/061-9187.20100924.Bnhju/iTunes64Setup.exe
10.0    http://appldnld.apple.com/iTunes10/061-8245.20100901.Pr4rg/iTunes64Setup.exe
9.2.1   http://appldnld.apple.com/iTunes9/061-8603.20100719.Dcfe4/iTunes64Setup.exe
9.2      http://appldnld.apple.com/iTunes9/061-7657.20100616.92msz/iTunes64Setup.exe

iTunes for Mac
10.2.1 http://appldnld.apple.com/iTunes10/041-0475.20110308.mAcaz/iTunes10.2.1.dmg
10.2    http://appldnld.apple.com/iTunes10/061-9637.20110302.Tnz2t/iTunes10.2.dmg
10.1.2 http://appldnld.apple.com/iTunes10/061-9991.20110127.ZxsE3/iTunes10.1.2.dmg
10.1.1 http://appldnld.apple.com/iTunes10/041-0027.20101215.AzsL3/iTunes10.1.1.dmg
10.1    http://appldnld.apple.com/iTunes10/061-9530.20101112.MSakc/iTunes10.1.dmg
10.0.1 http://appldnld.apple.com/iTunes10/061-9207.20100924.Nzse2/iTunes10.0.1.dmg
10.0    http://appldnld.apple.com/iTunes10/061-9183.20100902.X2ndX/iTunes10.dmg
9.2.1   http://appldnld.apple.com/iTunes9/061-8601.20100719.nhy5R/iTunes9.2.1.dmg
9.2      http://appldnld.apple.com/iTunes9/061-8440.20100616.Tnzs2/iTunes9.2.dmg

升級方法：
iTunes中，Shift+更新（Win）Option+更新（Mac）為升級固件，部分數據不會被清空
Shift+還原（Win）Option+恢復（Mac）為還原固件，會清空原有數據
DFU模式下還原固件，會完全清空全部數據

刷官方固件會使設備從越獄狀態變為未越獄狀態，同時會升級基帶版本。

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