According to a recent research, people have become so dependent on mobile phones that they check them every six-and-a-half minutes.
For many people, looking at their phone is the first thing they do each day - as they use its alarm function - and is also the last, the study found.
In between, phones are used to check the internet and read emails, as well as to make calls and send texts, the Daily Mail reported.
Mobile technology consultant Tomi Ahonen analysed a study commissioned by Nokia and found these behaviors.
In total, users check their smartphones an average of 150 times during a waking day of 16 hours, the research found.
Ahonen, who is considered by Forbes magazine to be the most influential voice on mobile technology, wrote on his blog that people make, receive or avoid 22 phone calls every day.
They also send or receive text messages 23 times a day, Ahonen said, and check the clock 18 times.
The average phone user places three calls per day and also receives three calls, he added.
Setting the alarm, playing games, changing songs, taking pictures and plugging and unplugging the phone all added to the number of phone views, he said.