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As a result of the foregoing, in 2010 compared to 2009: segment income before tax for our domestic fixed communications business increased by 3.4% from NT$17.4 billion to NT$18.1 billion (US$0.6 billion); segment income before tax for our mobile communications business decreased by 2.8% from NT$30.2 billion to NT$29.3 billion (US$1.0 billion); segment income before tax for our internet business increased by 5.1% from NT$9.3 billion to NT$9.8 billion (US$0.3 billion); segment income before tax for our international fixed communications business increased by 4.0% from NT$2.6 billion to NT$2.7 billion (US$91.0 million); and segment loss for our others business segment decreased by 5.5% from NT$2.3 billion to NT$2.2 billion (US$74.7 million). 

## Other Income, Net 

Our other income, net decreased by 62.1% from NT$0.8 billion in 2009 to NT$0.3 billion (US$11.0 million) in 2010. This decrease was primarily to a NT$0.2 billion (US$7.4 million) loss on disposal of property, plant, and equipment, and a NT$0.1 billion (US$5.8 million) net loss on valuation and disposal of financial instruments, and a NT$0.1 billion (US$3.6 million) net loss on foreign exchange. 

## Income Tax 

Our income tax was NT$12.7 billion in 2009, compared to NT$9.1 billion (US$0.3 billion) in 2010. Our effective tax rate was 22.3% in 2009 and 15.8% in 2010, primarily due to the reduction of the corporate income tax rate in the R.O.C. from 25% to 17% effective from 2010. Please refer to “Item 5. Operating and Financial Review and Prospects—Taxation” for a discussion of the change in tax rate. 

## Net Income 

As a result of the foregoing, our net income attributable to stockholders of the parent increased by 8.8% from NT$43.8 billion in 2009 to NT$47.6 billion (US$1.6 billion) in 2010. Our net margin was 22.1% in 2009 and 23.5% in 2010. 

The year ended December 31, 2009 compared with the year ended December 31, 2008 

## Revenues 

Our revenues decreased by 1.6% from NT$201.7 billion in 2008 to NT$198.4 billion in 2009. This decrease was primarily due to a decrease in operating revenues from domestic fixed communications, mobile communications and international fixed communications. 

