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1·Would you please call sb. to the phone?

能叫某人接电话吗？

2·We can not only send messages, call sb. up, but also can play games, and some even surf the internet.

但是，现在手机又那么多功能，不只局限于打电话发短信，还可以玩游戏，甚至上网。

3·A. call on sb. to do sth.

意思是“号召某人做某事”。