如何从United States拨打国际电话
In the US, 011 is the International Direct Dialing (IDD) prefix. Most American mobile networks also support the "+" sign (long-press 0) as a shortcut. Note that calls to Canada and many Caribbean nations are part of the NANP and don't require 011.
此号码告知本地运营商通话目的为国际。否则通话将按国内长途处理。
