Yealink released firmware version 80 - Excluded the T3X series
Version 80 was released on July 5th, 2015.
Yealink is a company I am solidly behind when it comes to desk phones. The quality, both physical and audio, are very nice for the price. There are certainly higher quality phones out there, but they carry a larger price tag also.
The T3X series was a work horse model for years, but ever since the T4X series was released 2 years ago, the updates for the T3X series have dwindled a lot. As you can see in the release note below the T3X series was not updated. The T3X series was last updated in October of 2014.
One new feature that could be a big thing for some people is the addition of CDP (Cisco Discovery Protocol)