The free software upgrade will be available in the fourth quarter, sometime between October and December, starting with Moto Z and G (4th Gen). Other Motorola devices eligible to receive the new Android version are Moto G Plus (4th Gen), G Play (4th Gen), X Pure Edition (3rd Gen), X Style, X Play, X Force, Droid Turbo 2, Maxx 2, Moto Z Droid, Z Force Droid, Z Play and Z Play Droid.