This part is multifunctional: it allows you to connect the charger and jack plug to your iPhone 6S, connect to the network and hear during calls. If any of these functions are not working properly, this is the part you need to replace.
This part connects the jack, Lightning connector, call microphone and network to the iPhone 6S motherboard. If you experience the following symptoms, it needs to be replaced:
The inside of the connectors is grey, originally fitted on a black iPhone 6S but can be easily installed on a white or gold model.