A new firmware update with build number 23.5.A.1.291 has begun to roll to the Xperia Z2 and Xperia Z3 family of devices. Right now the latest build number is only live on the Xperia Z2 (D6503), but we expect availability to widen very shortly. This new update is expected to re-introduce Sony’s new STAMINA mode onto Marshmallow. We will include FTF firmware links for all variants as they become live. Let us know what new features you find in the comments below.