What is the complete list of iOS devices (iPod Touch, iPhone, iPad) that are unable to update to iOS 5.0?
Devices not supported by iOS 5:
- iPhone (original)
- iPhone 3G
- iPod Touch first generation
- iPod Touch second generation
Source: http://www.apple.com/ios/features.html . "iOS 5 is compatible with: iPhone 3GS, iPhone 4, iPhone 4S, iPod Touch 3rd generation, iPod Touch 4th generation, iPad, iPad 2."