Experian Marketing Services’ Simmons Connect mobile and digital panel uncovered some facts on how people in US spend time on their smartphones.
This study exposed some info .. An average adult expend 58 minutes daily on their device.
And they also discovered that 'on what activity people are using their smartphone for most of the time'.

On average, smartphone owners devote 26% of the time they spend on their phone talking and another 20% texting. Social networking eats up 16% of smartphone time while browsing the mobile web accounts for 14% of time spent. Emailing and playing games account for roughly 9% and 8% of daily smartphone time, respectively, while use of the phone’s camera and GPS each take up another 2% of our smartphone day.

This study also disclosed a very important statement that iPone users spend more time than Android users

ReadMore at Experian.com

According to Adobe's Digital Index, Tablet are being used more than smartphones for surfing the web. They concluded this by analysing 100B visits to more than 1000 websites around the world.
Of all the web traffic, 8% alone is getting from tablets while for smartphones it is 7%. This is for the first time tablets surpassed smartphones.
[Via: Adobe blog]

Ending a long time rumor Canonical announced that it is going to release smartphone version of its OS Ubuntu.

This OS is currently the number three desktop operating system with 20M users, and about 30,000 downloads per day. 2012 was a great year for this popular Debian-based Linux distribution with Ubuntu 12.04 LTS as the most popular release in the history of Ubuntu.