Excuse me, do I need to open this international service to send messages to South Korea with China Mobile Card?

Hello, if you are a Beijing mobile number, you can send short messages to foreign numbers at home, and international, Hong Kong, Macao and Taiwan roaming services are not allowed. When sending, the format of number input is: international long-distance access code (00)+ other country/region code+customer number. For example, send short messages to mobile customers in Korea. The country code is 82, the customer number is 123456789 and the destination number is 0082 123456789 or +825 123456789. Tariff 1 yuan/article. Please refer to.