The fourth-generation iPod Touch was initially released with a single color option.
On October 12, 2011, with the release of the iPhone 4S, the white-colored version was added and the stainless steel back remained unchanged.
Unlike the iPhone 4, it did not officially support iOS 7 due to performance issues.
On November 14, 2013, Apple issued iOS 6.1.5 for the iPod touch (4th generation) to fix FaceTime calls failing.
[6] On February 21, 2014, Apple issued iOS 6.1.6 for the iPod touch (4th generation) and iPhone 3GS to fix faulty SSL verification.