国外打电话打不通说的英文

当国外打电话打不通时，常用的英文表达包括。

1、"The number you dialed is not in service."

2、"The subscriber you are calling cannot be reached at this time."

3、"The line is busy, please try again later."

4、"The call cannot be completed as dialed."

5、"Sorry, the phone is unreachable or the number you entered is incorrect."

根据不同的情境，可以选择合适的表达方式来说明电话无法接通的情况。