After releasing a revised version of iOS 4.2 GM for iPad to developers last week, Apple has just now seeded iOS 4.2.1 GM for iPhones, iPad and iPod touches. This build is meant for developers only. Only members enrolled in the iPhone Developer Standard or Enterprise Program can access these bits of by signing into Apple Developer Connection.
More updates on iOS 4.2.1 as they come.. Stay tuned !!
Download iOS 4.2.1 GM for iPhone, iPad, iPod touch and SDK