Android Jelly Bean (versions 4.1 and 4.2) continues to grow slowly, up to 28.4 percent of all Android devices, compared to 25 percent one month ago. The growth of Jelly Bean appears to be coming at the expense of Ice Cream Sandwich, which dropped 2 percent when compared to last month’s numbers.
Even though more than 50 percent of all Android owners are on Android 4.0 Ice Cream Sandwich and above.
Beginning last month, these charts are now built using data collected from each device when the user visits the Google Play Store. Previously, the data was collected when the device simply checked-in to Google servers. Google believes the new data more accurately reflects the overall stance of the ecosystem.