A man named Su Ning called the 110 hotline using his mobile phone.其中using是什么用法?

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A man named Su Ning called the 110 hotline using his mobile phone.其中using是什么用法?

A man named Su Ning called the 110 hotline using his mobile phone.其中using是什么用法?
A man named Su Ning called the 110 hotline using his mobile phone.其中using是什么用法?

A man named Su Ning called the 110 hotline using his mobile phone.其中using是什么用法?
using his mobile phone 是现在分词短语作方式状语,修饰谓语called
可以改为介词短语:
by using his mobile phone