Recently, the UI for Android 6.0 Marshmallow update for Sony Xperia devices has been leaked on the Internet, which is more or less similar to that of Android 5.0 Lollipop UI.
This image was leaked by Japanese telecom operator NTT Docomo, from Xperia Z5. Also, the Android 6.0 Marshmallow update has seeded for Xperia Z5 in Turkey and soon it will reach Xperia Z5 Compact and Premium.
On the other side, the company has announced that the Xperia M4 Aqua will be directly getting the Android 6.0, skipping the Android 5.1 Lollipop. Initially, the Android 6.0 Marshmallow was announced at the Google I/O on May 28th last year as Android M and later officially launched as Marshmallow on August 17th.
Moving on to the features of Android 6.0, it comes with App permission, Google's Now on Tap, Doze Mode, RAM Manager, Auto backup and restore, Battery life, Auto handling apps, Android Pay and etc.
Besides, the company has rolled out the Android 5.1 Lollipop update for Xperia M5 and Xperia M5 Dual, Xperia C4, Xperia C5 Ultra.