Why can't a Korean mobile phone send a message when it is plugged into a China card? Make a phone call or something. It's a mobile card of 182.

You mean that the other party bought China's number with a Korean mobile phone, but the text message can't be sent? It should be a standard question. At present, the standards of the United States, Japan, South Korea and China are different, but at present, most domestic mobile phones have no such problem when roaming out. This may happen if people from these countries and regions roam over. I wonder if you are the man I mentioned just now.