A new study on mobile phone usage, published in the Journal of Scientific Reports, suggests that women call their spouse more than any other person. This changes as their daughters become old enough to have children, after which they become the most important person in their mother’s life. The data also shows that, around their mid-30s, women start to switch the preference of their best friend from someone about their own age, so that by the time they are 45 a woman of a generation younger has become the “new best friend”.
