(Emergency help) Can I send a message to a Korean friend who is not in Korea with the mobile phones of China Mobile and China Unicom?

Yes, but your mobile phone needs international long-distance service:

1. Call back to the mainland: mobile phone +86, fixed line +86.

Second, call other countries and regions: call mobile phone:+[country code mobile phone number, call fixed line:+country code area code phone number.

Third, call local: call the other party's number directly.

4. Send SMS back to the Mainland: Send or send SMS directly to the international/Hong Kong, Macao and Taiwan:+(or "00") mobile phone number.