Hanging on the telephone

摘要

Growth in demand for smartphones is having a big effect on the mobile and wired networks, so much so that worries are being aired about the ability to support the projected number of users. The problem is the mobile phone network was designed to carry voice traffic; even text messages were not considered in the early days. Today, the mobile phone network carries more than 6billion text messages every day and more than 200million phones calls are in progress at any time.