Sony has officially declared its plans for releasing Android 6.0 Marshmallow update for its recent flagship. Starting from the first week of the next month, Sony Xperia Z5, Z3 and Z4 devices will be upgraded to Android 6.0.

According to Xperia Blog, a tweet from Sony Mobile U.K., the Japanese tech giant will start rolling out Android 6.0 Marshmallow software update from March 7 for Xperia Z5 series smartphones, Xperia Z4 Tablet and Xperia Z3+. Phone Arena is of the view that since Sony Mobile has not revealed any official information directly, the information shared by a representative from Sony may not be accurate and the arrival of the update may get delayed or cancelled.

Sony had launched Xperia Beta Program to test Android 6.0 Marshmallow OS in October 2015. At that time, it allowed a limited number of 10,000 registered users to try the new OS. Moreover, it only allowed Sony Xperia Z3 or Z3 Compact owners to join the Android beta program.

At the beginning, the beta program was available for 11 countries such as the U.K, Denmark, Germany, Finland, Iceland, Norway, Sweden, Ireland, Latvia, Iceland, Lithuania and Estonia. Now, it has added support for few more countries like Spain, Italy and Netherlands. Also, Xperia Z2 owners can also join the Xperia Beta Program.

The beta program was launched to assist the Sony UI team to let users try the new Android Marshmallow OS overlaid with Sony’s Xperia software so that they can eliminate all the bugs before making the upgrade widely available for other Sony Xperia devices. The beta program has received overwhelming response from the audience.

The official Sony Mobile blog has already declared the smartphones and tablets that will be upgraded to Android M. It includes Xperia Z5 series, Xperia Z4 series, Xperia Z3+, Xperia Z3 series, Xperia Z3 Compact, Xperia Z2 series, Xperia M5, Xperia M4 Aqua, Xperia C5 Ultra and Xperia C4.