请看相关英文报道：
China Unicom (Hong Kong) Ltd, the second-biggest telecom carrier in China, said it will introduce Apple Inc's iPhone 4S to the Chinese mainland as early as the end of December and no later than Jan 23, the date of the Chinese New Year, said a company official.
To that end, China Unicom has obtained from the Ministry of Industry and Information Technology a network access certificate, which is required to sell the iPhone 4S on the mainland, said Yu Yingtao, general manager of China Unicom's sales and marketing department.
解析：
在上述报道中，"carrier"就是“运营商”的意思。"telecom carrier"表示“电信运营商”。"carrier"还有“客运公司”和“传播媒介”的意思。
例句：
Singapore telecom carrier launches e-book service.
新加坡电信运营商开始推出电子书服务。
Your carrier for this flight is British Airways.
你的这一班机是英国航空公司的飞机。
Mosquitoes are carriers of malaria.
蚊子是疟疾的传播媒介。
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