Here is what's new in Windows Phone 8.1 Update 2

[Windows Central]

Microsoft has been hush-hush about Update 2 for Windows Phone 8.1, the second semi-major update for the operating system. The reasons should be obvious as the company is instead putting all resources on Windows 10 Mobile, which is the real future of the operating system.
As a result of this priority shift Update 2 (aka GDR2) is only going to select phones as an upgrade. So far, the only Lumias confirmed as getting updated are the Lumia 735 and Lumia 830, while the Lumia 640 and Lumia 640 XL ship with the newer OS already installed. The HTC One on Verizon and BLU Win HD LTE also have been updated.

So what is in Update 2? Microsoft has now published the changelog on their support site. However, it is not the whole story, so we will add a few more things that have been found in using the upgraded operating system.

Full story from the WindowsCentral blog...