以下是iOS9正式版官方固件下载地址（大家可以根据iOS设备背面的小字Model后面的编号来下载对应固件）：
iPhone：
iPhone4S：A1387(电信版&国际版)；A1431(联通专用型号）
http://appldnld.apple.com/ios9/058-25016-20150916-131EC4B2-5679-11E5-BBE9-BCF96CA99CB1/iPhone4,1_9.0_13A344_Restore.ipsw
iPhone5：A1428 - 3G+4G+GSM
http://appldnld.apple.com/ios9/058-21825-20150916-2CFEADD0-5678-11E5-9EC1-F7F76CA99CB1/iPhone5,1_9.0_13A344_Restore.ipsw
iPhone5：A1429；中国电信定制版-A1442 - 3G+4G+GSM+CDMA
http://appldnld.apple.com/ios9/058-23601-20150916-2D01837A-5678-11E5-97A2-F9F76CA99CB1/iPhone5,2_9.0_13A344_Restore.ipsw
iPhone5c：A1532 A1456 GSM
http://appldnld.apple.com/ios9/058-12416-20150916-2D014842-5678-11E5-8BA0-FBF76CA99CB1/iPhone5,3_9.0_13A344_Restore.ipsw
iPhone5c：A1516 A1526 A1529 A1507国际版
http://appldnld.apple.com/ios9/031-28090-20150916-2D01D21C-5678-11E5-B696-FCF76CA99CB1/iPhone5,4_9.0_13A344_Restore.ipsw
iPhone5s：A1453 A1533
http://appldnld.apple.com/ios9/058-25026-20150916-2D01E630-5678-11E5-88C3-FEF76CA99CB1/iPhone6,1_9.0_13A344_Restore.ipsw
iPhone5s：A1518 A1528 A1530 A1457国际版
http://appldnld.apple.com/ios9/058-21808-20150916-2D0C9B84-5678-11E5-A514-FFF76CA99CB1/iPhone6,2_9.0_13A344_Restore.ipsw
iPhone 6 Plus
http://appldnld.apple.com/ios9/058-11566-20150916-E5FE2B8A-5678-11E5-ABA0-42F96CA99CB1/iPhone7,1_9.0_13A344_Restore.ipsw
iPhone6
http://appldnld.apple.com/ios9/031-29698-20150916-ECC56014-5678-11E5-9EA3-66F96CA99CB1/iPhone7,2_9.0_13A344_Restore.ipsw