iPhone隱藏的收音功能可以透過以下步驟啟用：首先，打開設定，然後選擇「控制中心」。在控制中心選項中添加「聽力」。接著，下滑到控制中心，點擊「聽力」。連接耳機後，啟用「實時收聽」功能。當把手機放在其他房間時，透過耳機就能聽到手機捕捉到的聲音。

The hidden radio function of iPhone can be activated through the following steps: First, open Settings and select "Control Center". Add "Hearing" in the Control Center options. Then, swipe down to access the Control Center and tap on "Hearing Aid". After connecting headphones, enable the "Live Listen" feature. When the phone is placed in another room, you can listen to the sounds captured by the phone through the headphones.