Some "53 per cent of mobile instant message users in our survey indicated they have not changed the amount of SMS messages they send and receive due to mobile IM," he said.
Fadaghi said that using services like Skype to replace phone calls had been limited due to 3G network reliability issues, but many were using it to save costs on overseas calls.
In the United States, more than two trillion text messages are sent each year, generating more than $20 billion in revenue for the industry. SMS revenues account for about a third of Verizon's operating income, in fact.
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