Software update available for Verizon HTC DROID DNA - adds support for the TalkBack feature
On the Verizon web site it says: Key device enhancements include: Support for the TalkBack feature has been added - this enhancement makes Internet accessibility easier for the visually impaired. After the update, you should be at Version 2.07.605.1 710RD. During the install, it optimized all the apps on my phone - I'm guessing to take advantage of the features added with TalkBack.
At the Google Play Store, it says: TalkBack is an Accessibility Service that helps blind and vision-impaired users interact with their devices more easily. This application adds spoken, audible, and vibration feedback to your device. It is a system application that was pre-installed on most devices and is updated when the accessibility service is improved.