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(1) Includes monthly fees. 

As the market for mobile services has continued to expand, we have experienced substantial growth in our mobile customer base. We are the largest mobile operator in Taiwan in terms of revenues and number of customers. We had 9.68 million mobile customers, for a market share of approximately 34.8% of total mobile customers and approximately 34.2% of total mobile services revenues in Taiwan, as of December 31, 2010. 

We offer digital mobile service through our dual band GSM network. We are one of the three national licensed providers of GSM services. We have been allocated 15 MHz in the 900 MHz frequency band and 11.25 MHz in the 1800 MHz frequency band for GSM services and general packet-switched radio services, or GPRS, and 15 MHz paired spectrum plus 5 MHz unpaired spectrum in the 2 GHz frequency band for 3G mobile services. This is the largest frequency spectrum allocation to any mobile operator in Taiwan. In February 2002, the Ministry of Transportation and Communications granted 3G mobile services concessions to five companies, including us. In March 2002, we paid NT$10.2 billion to the government for our concession. Our 3G mobile services license is valid until December 31, 2018. In July 2005, we launched our 3G mobile services using WCDMA technology. We also offer the largest international roaming network among Taiwan mobile service providers. In particular, our 2G customers have access to 338 networks in 179 countries through our GSM service roaming network and 227 networks in 113 countries through our GPRS roaming network. In addition, our 3G service system includes 101 networks in 52 countries. 

As of December 31, 2010, we had approximately 16,215 cellular base stations (including both GSM base stations and 3G cellular base stations) covering substantially all of Taiwan’s population. We use these base stations to support both our GSM network and 3G networks. In 2010, we upgraded more than 6,756 3G cellular base stations with HSDPA capacity and 2,455 GSM base stations with EDGE capacity in the larger metropolises of Taiwan. We will continue this process of implementing HSDPA and EDGE upgrades in the major areas of Taiwan. 

The following table sets forth information regarding our mobile service operations and our mobile customer base for the periods indicated. 

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