Google has begun testing an update for its Android mobile operating system on Google employees’ phones before releasing it to the public.

An over-the-air update for Android 4.0, a.k.a. Ice Cream Sandwich, recently arrived on some employees’ Nexus S phones, according to an Android report. .

Ice Cream Sandwich began shipping last month on Samsung’s Galaxy Nexus in Europe, although it is still unavailable in most parts of the world, including the US.