However, the rapid growth has dramatically slowed in recent years. The number of text messages sent via the China Mobile network reached 736 billion in 2011, with only a small year-on-year increase.

China Mobile's revenue from its text messaging service fell to 46.5 billion yuan ($7.3 billion) in 2011 from a peak of 53.6 billion yuan in 2009.

Li Ruiru, a 23-year-old employee of an travel agency in Guangdong province, said she sends fewer than 100 text messages a month, compared with about 200 in the past, after she became a big fan of WeChat. Her father, who is 62, however, said that WeChat doesn't have a big influence on the number of text messages he sends because he doesn't use the service frequently.

Chen Zhengyu, a stock analyst with China Merchants Securities (HK) Co Ltd, said: "For older people, it's more difficult to rely on mobile Internet services like WeChat. It's the opposite for younger people, most of whom have an account to use Tencent's services."

Shen at Gartner added that text messages sent by individual consumers have declined, but messages from companies and organizations, are still on the rise.

"Overall, China's short message market has reached a plateau," Shen said.

"Wireless data traffic replaced short message services to become the biggest revenue source for China Mobile's data business in the first half of 2012," Shen Hongqun, deputy manager of China Mobile's data business department, said in an interview last year.

Ning Wright, partner of KPMG China, said the text message services and voice services users are migrating to data, and that the market will be dominated by data in the coming years.

"Compared with some innovative mobile applications, short messages are very basic in terms of display and cannot send any attachments such as photos to share," Wright said.

Additionally, text message services cost more than other Web-based apps, which are mostly free, Wright added.

Analysts said the text message business in China, if it remains in its current format, will face a steady decline.

"One of the ways to slow down the drop in demand for short message services is to offer them as an add-on package to voice services either free of charge or at a very low cost to attract customers with low-spending power," Wright suggested.

Contact the writers at chenlimin@chinadaily.com.cn and shenjingting@chinadaily.com.cn

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