The August comScore mobile survey (MobiLens) is out. It measures the penetration or consumption of various mobile products and services in the US over a three month period.

I track the change in this data over time. Here are some highlights:

In August about 520,000 users switched to using smartphones (from non-smart phones) as their primary phone. This is a bit down sequentially from July but about average for the period starting January 2010.

Penetration increased by about 1 % to 36%.

Extrapolating this growth implies 50% penetration by September 2012. However growth is accelerating slightly so that tipping point may come sooner. Separately, T-Mobile reported that 75% of its device sales during this year have been smartphones, so if this is indicative of overall US market, then by next year it may in fact be quite difficult to find any non-smart phones to buy.

Among the smartphones, the different OSs have the following installed bases: