Sony has released the Android 6.0.1 Marshmallow Xperia Beta to Xperia Z3, Xperia Zx3 Compact and Xperia Z2 phones, along with new changes and highlights in features previously revealed. More details here.
Google Nexus 5x can now be rooted on Android 6.0.1 Marshmallow with the latest security update through factory image. The factory image can also be rooted with Nexus 5, Nexus 6 and more. Root here.
Samsung Galaxy Note 5 under AT&T is expected to receive the Android 6.0.1 Marsmallow's official over-the-air update on March 14, following Verizon Wireless's release last week. More details here.