iOS A5 5.1.1 JB支援機型

Here is the list of devices that are known to work for sure :

• iPhone 4
• iPhone 4S
• iPad 1
• iPad 2 Wifi
• iPad 3 Wifi

Here is the list of devices that won't be supported :

• iPhone 3Gs
• iPod 3G
• AppleTV 3

Remains :

• iPod 4G
• iPad 2 GSM
• iPad 2 CDMA
• iPad 2 Wifi, R2
• iPad 3 CDMA
• iPad 3 Global
• AppleTV 2