A new study has revealed that women's gossip machine, the mobile phone also doubles as their security to keep predatory men at bay.
The finding is part of a new study which suggests the devices have changed the way we interact with each other.
A total of 16,500 people were quizzed for the Mobile Life Report which reveals insights into how we live.
The study found that 54% of females under 25 had used a mobile when out alone to put people off approaching them. It has become a new "barrier" for women to fend off unwanted attention, where a newspaper or magazine would have been used in the past to show that they were preoccupied.
On an average, people sent 3.6 text messages a day compared with 2.8 voice calls a day, and that around one in 10 people have had a mobile stolen. Women aged between 18 and 24 were most at risk, reports the Independent.
The study, which was published by The Carphone Warehouse and the London School of Economics, also showed that a quarter of people paused to turn off their phones or switched them to silent mode before sex.
So, guys the message is clear, the next time you see a woman hold a mobile phone to her ear, or sitting typing a text, chances are that the real message is intended for you to stay away.