The first Sony smartphone to be given the option to run experimental Concept software was the Xperia Z3 in 2015. Last year it passed the torch to the Xperia X, which has been receiving Concept builds ever since - the latest one mere hours ago bringing Android 7.1.2 into the mix. All good things come to an end, as they say, and so will the Concept releases for the Xperia X. The last one will be outed in early May, after which the Concept program for the Xperia X will essentially end. All hope is not lost however, since a new phone may take over the Concept program and receive some...
Source: http://www.gsmarena.com/xperia_x_concept_builds_end_in_early_may_xz_premium_may_take_over-news-24612.php