Almost seven months after Google announced the latest version of its Android OS, over 90% of devices are still running versions up to five years old - but the Lollipop rollout is gaining momentum.
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Six months after Google announced Android 5.0, just 5.4% of Android devices now have Lollipop - which means it's still on fewer devices than Android 2.3 Gingerbread or 4.0 Ice Cream Sandwich.
Google have updated the Play Store, including a new UI and design language which is used in Google's Search apps, as well as Google Now. The new Store design is said to help users find new content.
Research finds that BlackBerry 7 is the most secure mobile OS, but researchers criticise Android's fragmentation as a security flaw, as well as its reliance on users understanding app permissions.