Sony has announced to bring the Android 6.0 Marshmallow update to the Xperia Z5, Z5 Premium and Z3 Plus phones over the weekend. The announcement comes via Sony’s official Twitter account.
https://twitter.com/SonyXperiaIndia/status/708287346186137600
Thankfully for Xperia Z5 owners there is minimal waiting as owners have already begun to receive the same towards the end of last week as can be seen from the screenshot below.

The update brings Android 6.0 Marshmallow, enhanced privacy settings with app data permissions, a new camera interface with simple gestures for customisation, Xperia Messaging, Smart battery life and Direct Share.
The update is about 1280MB in size and we would recommend backing up your smartphone before updating.
Sony had officially launched the Xperia Z5 and Xperia Z5 Premium in India at Rs 52,990 and Rs 62,990, respectively, in October last year. While the Xperia Z5 was an update to the Xperia flagship line, the Xperia Z5 Premium took things to the next level on the display front. The new Sony devices were competing with flagships from other companies such as the iPhone 6s, 6s Plus, Nexus 6P, among others.You can take a look at our Sony Xperia Z5 and Xperia Z5 Premium first impressions .
The company had launched the Z3+ in July last year. This phone replaced the incumbent Z3 as the flagship phone from the Japanese company. The camera performance is one of the best we have seen among the current crop of flagship devices, specially the steadyshot videos and the battery life of the phone impresses. You can read our complete review to know more about the device.
Meanwhile, in an official blog , Sony writes to bring the Xperia Marshmallow beta program to select Xperia Z3, Z3 Compact and Z2 devices.