STAMINA Mode returns to the Sony Xperia Z5 series following software update
And now, it is back. An update that comes with Android 6.0.1 and takes the software version from 32.1.A.1.185 to 32.2.A.0.224, has been released. The models now receiving the update include the Sony Xperia Z5, (E6603), Sony Xperia Z5 Dual (E6683) and the Sony Xperia Z5 Compact (E5803, E5823). The Sony Xperia Z5 Premium has yet to receive the update, but we expect the phone to receive it at any time.
The new software version returns STAMINA Mode and Ultra STAMINA Mode. The latter is a more aggressive way to extend the battery life by "limiting the available apps to the minimum required." The update also adds the April 1 Google security patch, and a new way to open the camera from the lock screen. All you need to do is press the power button twice to open the camera.
When you receive the notification that the update has arrived, before you start the updating process you should make sure that you are hooked up to a Wi-Fi network. At the same time, your battery should be at least 50% charged. And be patient. It is an OTA update which means it will be sent out in waves. If you don't receive the update immediately, be patient. It will come.