Should I open Unicom's international roaming or international long distance if I want to receive short messages abroad?

Need to open international roaming rights/functions.

After the international roaming is opened, the international long distance is automatically opened.

Pre-paid users do not need to apply, and international roaming services in Hong Kong, Macao, Taiwan, Malaysia, South Korea, Vietnam and other regions and countries are opened by default.

Eligible post-paid users can log on to the online business hall at www.10010.com/02oec, click on "Business Handling" > "International Business" > "International Roaming in Taiwan, Hong Kong and Macao" to open roaming rights for international roaming in Taiwan, Hong Kong and Macao, and choose to order superimposed packages.

You can also contact local customer service or consult in the business hall.