NPD Connected Intelligence has recently completed a study that shows Android smartphone users download an average of 870MB of data through their cellular connections. This pales in comparison to the average 2.5GB consumed via Wi-Fi networks. Unfortunately, at this time, there is no data for iOS devices.
This is useful data for consumers to consider, since cellular providers have been switching to tiered models as of late. Going with the base plan might not be enough data, considering that AT&T's base iPhone plan offers 300MB per month. Still, it shows that users take advantage of Wi-Fi, where available, likely due to the faster connection or limited data allotment.
The data is split up by age and comes from an app installed on 1,000 Android smartphones. Not surprisingly, 18-24 year olds use the most cellular data at 1.05GB per month. However, the 25 to 34 group utilized Wi-Fi the most, downloading around 3GB per month. Of course, the 55 and older group who is less likely to be comfortable with smartphones consumed just 750MB of cellular data and 1.42GB of Wi-Fi data.