Smartphones are clearly becoming a commonplace phenomenon. In the USA, smart-phones now comprise more than 20% of all cellular phones, and this number is expected to rise to more than 40% in a few years.
What’s most interesting about smartphones is that, unlike feature phones, smartphones can have a useful second life.
Imagine meeting someone new or a friend a colleague after a long time and you decide to exchange phone numbers with that person. Exchanging a phone number the usual way would mean asking the other person for his/her contact information, typing in his/her name and phone number, storing it in the phone’s address book, calling the other person, and then having the person type in your name and storing your information.

A Boston-based company called MobileSphere has just announced a service called Slydial to send a voicemail to any mobile phone in the U.S. without having the risk of the called party answering the call. Anyone can send a voicemail by calling 267-SLYDIAL (267-759-3425) and entering the phone number of any U.S. mobile subscriber. The service is free, but you have to listen to a 10-second audio advertisement.