The most Alldocube Tablet are equipped with the Android OS from the Android 5.1 to Android 7.0 OS, and the question that most customers are interested in is the time when the Android OS can be upgraded. We are Alldocube Tablet online store that we aims to provide the best service to our customers and once we get the upgrade files then we will update it at first. You can look and buy the models in stock at here: http://www.cube-tablet.com/buy-products.html