This part is multifunctional: it allows you to connect the charger to your iPhone 7, connect to the network and hear during a call (microphone). If any of these functions are not working properly, this is the part you need to replace.
This component connects the Lightning connector, the call microphone and the network antenna to the iPhone 7's motherboard. If you are experiencing the following issues, it needs to be replaced:
You can choose the colour inside the Lightning connector: Black / Grey / White