All the Texts, Without All the Costs

Even though a text message usually costs the carriers less than a penny to route between mobile phones, they charge customers as much as 20 cents to send a text and another 20 cents to receive one. This adds up to an estimated $20 billion a year in revenue for the wireless industry and a lot of grumbling from consumers who feel abused.

But in the last two years there has been a proliferation of mobile apps, the latest being Apple’s iMessage, that allow users to text free. While they differ in format and ease of use, they all work on the principle of sending and receiving texts via cellphones’ data streams. “Traditional texts are sent over a defined protocol, like their own channel, that is different from the voice and data channels,” said Michael O’Brien, senior vice president for marketing solutions at Syniverse Technologies, a company that develops products and services for the wireless industry. A single text message sent via a texting app uses no more than 160 bytes of data. Most cellphone data plans are 2 to 10 gigabytes (one gigabyte is about a billion bytes). So even if you texted someone all of “War and Peace,” 160 characters at a time, you would still have ample data left on your plan — although you might lose a friend.