This means that Sony could be planning to roll out the long-awaited Lollipop update across its Xperia line of smartphones.
The firmware was actually certified on February 16, which gels with Sony’s earlier claims that Lollipop would land on Xperia handsets this month.
Sony is one of the slower OEMs to roll out Lollipop, with many other big name brands having already pushed out the update, namely Samsung, LG, and HTC.
Although Lollipop’s source code was released months ago, Sony re-skins the software with its on Xperia aesthetic, adding design changes and features.
Sony’s Xperia UX was vastly different from the ‘material design’ aesthetic proposed by Google for Lollipop OS, so the company likely spent a lot of time getting the software design right.
It’s also worth noting that rumours have pointed to a March or April launch for the Sony Xperia Z4.
This handset is almost assured to land with Lollipop straight out of the box, which means Sony is running out of time to ready up its Android ROM.
Related: Best Android Phones 2015
Sony launched the Xperia Z3 back in September last year, just six months after its predecessor, the Xperia Z2, was released.
The Xperia Z3 comes with a 2.5GHz quad-core Snapdragon 801 chip, 3GB of RAM, a 20.7-megapixel rear-facing camera (ISO 12800), 16GB of built-in storage, and 4G/LTE support.