The ZTE Blade A2 was launched back in June last year. It came with Android 5.1 Lollipop-based MiFavor 3.2 out of the box. However, now it looks like the device will get the Marshmallow update soon, as an Android 6.0-powered Blade A2 has been spotted on GFXBench. Sadly, there's currently no information on when exactly the update will be rolled out, but given that it has started appearing in benchmarks, it'd be reasonable to say that the roll out shouldn't be too far away. Source
Source: http://www.gsmarena.com/zte_blade_a2_with_android_60_spotted_on_gfxbench-news-22784.php
