NEW YORK (TheStreet) -- Growing demand for smartphones and greater availability of high quality networks have led to healthy growth in data revenues, which includes Internet and SMS, for network operators like Sprint (S) - Get Report, AT&T (T) - Get Report, and Verizon (VZ) - Get Report.

In recent years, Sprint has seen a significant jump in its monthly Internet and SMS revenue per mobile subscriber from around $5.80 in 2005 to around $14 in 2009 based on our estimates. We expect the positive growth trend to continue, albeit at a slower rate, accounting for a larger user base and increased competition.

The average Trefis member forecast projects a higher mobile data average revenue per user (ARPU) than what we currently forecast, corresponding to an additional upside of 20% to our price estimate. We currently have a Trefis price estimate of $4.35 for Sprint's stock, about 9% above the current market price of around $4.00.

Smartphone Demand + Good Network Speeds = Higher Data Usage

Internet & SMS revenue per Sprint mobile subscriber refers to the average monthly amount spent by Sprint's customers on non-voice communication, such as messaging, surfing the Internet, downloading music, playing games, and any other data-intensive activities.

With a marked improvement in both connection speeds and reliability, data usage has moved on from the traditional SMS or text messaging to higher bandwidth consumption activities like sending email and, increasingly, video clips. A

TechWorld

article, sourcing Cisco's study, suggests that data usage for U.S. subscribers with 3G (or better) phones is poised to rise from the current 32 MB a month to as high as 739 MB per month by 2013.

Increasing use of smartphones like

Apple

's

(AAPL) - Get Report

iPhone and

RIM

's

(RIMM)

BlackBerry have resulted in higher data usage.

In addition to constantly improving operating systems and new handset features, customized games and social media apps for mobile phones allow users to access social media sites Twitter and Facebook from their phones. Accessing emails, posting status updates, and uploading pictures all consume significant amounts of data, generating more revenues for network operators like Sprint. According to Sprint CEO, Dan Hesse, nearly half of Sprint's subscriber base would be using smartphones by end of 2010.

Downside: Drawbacks to higher data use is the increased costs of maintaining this network and intense competition among wireless operators that could prevent them from hiking rates as quickly as in the past, resulting in slower growth in data ARPU for Sprint.

The average forecast of Trefis members for Internet & SMS revenue per Sprint mobile subscriber indicates an increase from around $17 per month in 2010 to around $23 by the end of the Trefis forecast period, compared to the baseline Trefis estimate of an increase from $14.70 to around $19 during the same period. The member estimates imply an additional upside of 19% to the Trefis price estimate, which is around 9% higher than Sprint's current market price.

Our

complete analysis for Sprint Nextel's stock is here.

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