What does this icon in my notification window mean? Recently an icon has started to appear in my notification window. What does it mean ?



Click image for larger version
Its shows that your phone is in Extended Standby Mode.

You can find it in Settings-&gt;PowerManagemnet 

Extended standby mode increases the standby time by reducing the background activities when the phone is in standby mode.

Data will automatically be turned off and background activities will be stopped from waking up , while applications will also be prevented from syncing data.

You will still be able to receive calls and texts, while the calendar application and  alarms will still feature normally. As soon as you unlock your smartphone it'll go returning to functioning normally.

Any ongoing downloads or bluetooth transfer will be allowed to complete and once completed data will be turned off.

Extended standby mode is replaced with Stamina Mode for Xperia running on Jellybean or higher

Source : SONY