Earpiece Receiver FPC for iPhone X – JCID (Flex Cable Details)

The Earpiece Receiver FPC (also called Earpiece Flex Cable, Front Sensor Flex, or Ear Speaker Flex) is the flex cable assembly used inside the iPhone X.
The JCID version is an aftermarket premium-quality replacement used when repairing Face ID–related parts.

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1. What the Earpiece Receiver FPC Does

This FPC flex cable contains several important components:

a. Earpiece Speaker Connection

• Connects the earpiece speaker (top speaker used during calls)

• Provides clear audio for phone calls and FaceTime

b. Proximity Sensor

• Turns the screen off when the phone is close to your ear

• Prevents accidental touch during calls

c. Ambient Light Sensor

• Automatically adjusts screen brightness

• Helps save battery

d. Flood Illuminator Connector (Part of Face ID System)

• Works with the dot projector and infrared camera

• Necessary for Face ID to function properly

e. Microphone (Front/Noise Cancelling Mic)

• Used for:

  • Noise cancellation

  • Video recording

  • FaceTime calls

  • Siri detection

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2. What Makes the JCID Version Different?

JCID is a well-known aftermarket brand used by repair technicians for Face ID–safe repairs.

JCID Earpiece FPC Features

• High-quality flex cable; stable connection

• Supports Face ID rewriting using JCID Programmer

• Compatible with most iPhone X front sensor modules

• Designed to prevent Face ID loss after replacement

• Durable connector pins and strong solder joints

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3. When Do You Need to Replace This Part?

You may need a new Earpiece Receiver FPC if:

• Earpiece (call speaker) is not working

• Face ID stops working (due to damaged flex cable)

• Screen stays on during calls (proximity sensor failure)

• Auto-brightness not working

• No sound in video recordings from the front mic

• Flex cable is torn during screen replacement

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4. Important Note About Face ID

On the iPhone X, the original front sensor flex contains encrypted data.
If it is damaged:

• Face ID will stop working

• Replacing the flex alone will not restore Face ID

• JCID tools allow transferring the original data to a new flex cable

This is why JCID flex cables are popular among professional repair shops.