iOS 5 Beta版本下载地址已经放出，需要注意的是部分连接还需等待正式开放后才可以下载，且需要开发者账号(ADC)。
Beta版本被认为是最接近零售版本的版本号码，所以这次iOS5的Beta版本几乎和正式版本无异，有兴趣的朋友可以自行寻找适合自己设备的固件进行下载。
iOS 5 Beta For iPhone 3GS
http://adcdownload.apple.com/iOS/iOS_5_beta/iOS_5_beta__iphone_3gs__9a5220p.dmg
http://adcdownload.apple.com/iOS/iOS_5_for_it/iOS_5_beta__iphone_3gs__9a5220p.zip
iOS 5 Beta For iPhone 4
http://adcdownload.apple.com/iOS/iOS_5_beta/iOS_5_beta__iphone_4__9a5220p.dmg
http://adcdownload.apple.com/iOS/iOS_5_for_it/iOS_5_beta__iphone_4__9a5220p.zip
iOS 5 Beta For iPhone 4 CDMA
http://adcdownload.apple.com/iOS/iOS_5_beta/iOS_5_beta__iphone_4_cdma__9a5220p.dmg
http://adcdownload.apple.com/iOS/iOS_5_for_it/iOS_5_beta__iphone_4_cdma__9a5220p.zip
iOS 5 Beta For iPod Touch 3Gen
http://adcdownload.apple.com/iOS/iOS_5_beta/iOS_5_beta__ipod_touch_3rd_generation
__9a5220p.dmg
http://adcdownload.apple.com/iOS/iOS_5_for_it/iOS_5_beta__ipod_touch_3rd_generation
__9a5220p.zip
iOS 5 Beta For iPod Touch 4Gen
http://adcdownload.apple.com/iOS/iOS_5_beta/iOS_5_beta__ipod_touch_4th_generation
__9a5220p.dmg
http://adcdownload.apple.com/iOS/iOS_5_for_it/iOS_5_beta__ipod_touch_4th_generation
__9a5220p.zip
iOS 5 Beta For iPad
http://adcdownload.apple.com/iOS/iOS_5_beta/iOS_5_beta__ipad__9a5220p.dmg
http://adcdownload.apple.com/iOS/iOS_5_for_it/iOS_5_beta__ipad__9a5220p.zip
iOS 5 Beta For iPad 2 WIFI
http://adcdownload.apple.com/iOS/iOS_5_beta/iOS_5_beta__ipad_2__9a5220p.dmg
http://adcdownload.apple.com/iOS/iOS_5_for_it/iOS_5_beta__ipad_2__9a5220p.zip
iOS 5 Beta For iPad 2 GSM
http://adcdownload.apple.com/iOS/iOS_5_beta/iOS_5_beta__ipad_2_gsm__9a5220p.dmg
http://adcdownload.apple.com/iOS/iOS_5_for_it/iOS_5_beta__ipad_2_gsm__9a5220p.zip
iOS 5 Beta For iPad 2 CDMA
http://adcdownload.apple.com/iOS/iOS_5_beta/iOS_5_beta__ipad_2_cdma__9a5220p.dmg
http://adcdownload.apple.com/iOS/iOS_5_for_it/iOS_5_beta__ipad_2_cdma__9a5220p.zip
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