Sony has started Android 6.0 Marshmallow beta program for Xperia Z2, Xperia Z3 and Xperia Z3 Compact and launched a Play Store application called ‘Xperia Beta Program’, which allows users to join the Xperia Marshmallow beta testing program. Note that this beta testing program is different from Sony’s Concept Android Marshmallow beta program, as this the official Xperia firmware for Sony devices that will be released for the public.
Currently, Sony’s Xperia Marshmallow Beta program is available in Spain, Italy and Netherlands only. Owners of Xperia Z2 (D6503), Z3 (D6603) and Z3 Compact (D5803) in these countries, who wish to try out the pre-release beta version of the Android 6.0 Marshmallow, install the app ‘Xperia Beta Program’ from Play store and sign up.
The Xperia Beta Program is intended to test out the final firmware before the official release to the public. This is something like Motorola’s Soak test and allows users to test a beta firmware prior official launch. It means owners of Z2, Z3 and Z3 Compact will get the official Android 6.0 Marshmallow OTA update very soon.
How to Participate in the Xperia Marshmallow (Android 6.0) Program
Download and install the app ‘Xperia Beta Program’ from Play store [HERE], open it and tap ‘Next’. Enter your email, name, phone number, gender, type of users and sign up to participate.
Before you start, please note that this is a beta test for Android 6.0 (Marshmallow) and for select Xperia Z2, Z3 and Z3 Compact owners in Spain, Italy and Netherlands. Not all are eligible for the beta test. Such users are advised to wait for the final release, which may roll out in the next month. (Source)