Do I need a country code and area code to send SMS to American mobile phones?

Damn it, that uncle upstairs, you are so awesome, you can add or not, who do you listen to? There is no international area code. Who knows who you want to send it to?

When making an international call, you must add the area code. Just like making a phone call, the area code in the United States is+1, and all American phones are 10 digits, making a total of1/kloc-0 digits.

Operators in China also support the number 00+, =00 1+ American telephone.