謝謝熱心回答不過不懂的人請勿誤人子弟請參考4G雙卡雙待智慧型手機懶人包https://tw.tech.yahoo.com/news/4g%E9%9B%99%E5%8D%A1%E9%9B%99%E5%BE%85%E6%99%BA%E6%85%A7%E5%9E%8B%E6%89%8B%E6%A9%9F%E6%87%B6%E4%BA%BA%E5%8C%85-024900907.html