Phones are becoming extensions of ourselves. They carry details of our lives, our likes and dislikes. They're with us almost every hour of every day.
Experts at the London School of Hygiene and Tropical Medicine believe texting can help people quit smoking. They call the program - "TXT2 Stop."
The team spent more than two years recruiting thousands of smokers to take part in a random-controlled trial to see if texting could persuade them to give up. Nearly six thousand people from the UK signed up.
They were asked what triggered them to give up, and what health problems they suffered. They had to give doctors the date they planned to quit altogether.
Six months after the trial, each smoker sent in a swab. These were tested for a by-product of smoking to
