What number should I add to international roaming SMS?

When users roam to overseas mobile networks, the short message sending method is the same as that in China. Just enter the other party's number directly in the receiving number column. 1. Send to Chinese mainland mobile phone: directly enter the mobile phone number; 2. Send to Chinese mainland PHS: 0+ domestic long-distance area code+PHS number; 3. Send to local mobile phones or mobile phones in other countries and regions: 00+ country code+user number. Click "official website" Customer Service 22 1 below for more service offers.